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“PHP2Shell”
securityweek.comarticle🛡️ Security

PHP2Shell Attacks Root Palo Alto Firewalls but Fail Against WordPress

PHP2Shell (CVE-2026-109618 and CVE-2026-109619) has been exploited for over a week. A China-linked group chained it with the Fragnesia Linux kernel privilege escalation to root at least 25 Palo Alto Networks PAN-OS firewalls with exposed management interfaces. Defiant had seen no confirmed WordPress compromise by 28 October 2026 despite 77,000 requests, and Cato and watchTowr report few successful attackers.

PAN-OSPHPWordPress+2
CVE-2026-109618CVE-2026-109619PHP2Shell+8

Threat Intel, AppSec· Published and added 30 Oct 2026

aikido.devarticle🛡️ Security

What are shell vulnerabilities? PHP2Shell, Node2Shell (HTTP2Shell), React2Shell and Log4Shell explained

Explainer on "shell" vulnerabilities, the -Shell naming for RCE flaws that began with Log4Shell (CVE-2021-44228). It compares memory-corruption bugs (PHP2Shell, CVE-2026-109618 and CVE-2026-109619; Node2Shell, CVE-2026-111497, in the Brotli decoder) with design-flaw bugs (Log4Shell, React2Shell, CVE-2025-55182). It covers shared traits, exposure through inherited components, and Brotli patch status across runtimes and distributions.

PHPNode.jsReact+3
CVE-2026-109618CVE-2026-109619CVE-2026-111497+16

AppSec, Learning· Added 30 Oct 2026, published 29 Oct 2026

unit42.paloaltonetworks.comadvisory🛡️ Security

Threat Brief: Critical Vulnerabilities in PHP: CVE-2026-109618, CVE-2026-109619 (Updated October 29)

Unit 42 threat brief on PHP2Shell, two PHP remote code execution flaws, CVE-2026-109618 and CVE-2026-109619 (CVSS 4.0 9.2), both caused by longjmp() error handling that leaves memory uninitialized or freed. Cortex Xpanse counted over 22.6 million exposed instances. The 29 October 2026 update says attackers chained PHP2Shell with a Linux kernel privilege escalation against internet-exposed PAN-OS management interfaces. An earlier 23 October claim of post-compromise activity was retracted on 25 October.

PHPPAN-OSLinux kernel+2
CVE-2026-109618CVE-2026-109619PHP2Shell+2

Threat Intel, AppSec· Added 30 Oct 2026, published 29 Oct 2026

bleepingcomputer.comarticle🛡️ Security

CISA warns of Fragnesia Linux flaw chained in PHP2Shell attacks

Fragnesia (CVE-2026-46300) is a Linux kernel XFRM ESP-in-TCP logic bug in the Dirty Frag class that gives local attackers root, with a public PoC. CISA added it to the KEV catalog and ordered federal patching under BOD 26-04. Attackers chain it with PHP2Shell (CVE-2026-109618, CVE-2026-109619) to implant PHP webshells. Dream Security tied the chain to 25 rooted servers in the US, Japan, Taiwan and South Korea.

Linux kernelLinuxPHP+1
CVE-2026-46300CVE-2026-109618CVE-2026-109619+9

Threat Intel, Offensive Security· Added 30 Oct 2026, published 29 Oct 2026

securityweek.comarticle🛡️ Security

Adobe, Veeam, Juniper Networks Patch Critical Vulnerabilities

SecurityWeek roundup of patches from Adobe, Veeam and Juniper Networks covering over three dozen vulnerabilities. Adobe fixed 12 flaws (eight critical in Campaign Classic), Veeam fixed nine (including a cross-tenant RCE in Backup for Microsoft 365), and Juniper fixed 18 in Session Smart Router and Conductor. None were reported exploited. Juniper said CVE-2026-109618 (PHP2Shell) affects Junos OS but is not exploitable there.

Adobe Campaign ClassicVeeam Backup & ReplicationVeeam Backup for Microsoft 365+2
CVE-2026-109618PHP2Shell

other· Published and added 29 Oct 2026

aikido.devarticle🛡️ Security

Ghost in the PHP2Shell: Why coordinated disclosure and patching will start moving faster

Aikido's analysis of the PHP2Shell disclosures (CVE-2026-109618 and CVE-2026-109619), published October 2026. It covers the timeline: the CVE IDs leaked on 20 October, PHP moved its release to 21 October, and Amazon reports exploitation attempts from 17 October. It cites Censys data (32.5 million services still affected on 27 October) and argues that AI-driven discovery and exploit building call for shorter embargoes and faster patching.

PHPAikido SecurityCodex+2
CVE-2026-109618CVE-2026-109619PHP2Shell+8

AI Security, AppSec· Added 28 Oct 2026, published 29 Oct 2026

securityweek.comarticle🛡️ Security

China-Linked Hackers Exploit PHP2Shell to Root Firewalls

A China-linked actor chained PHP2Shell (CVE-2026-109618, CVE-2026-109619) with the Fragnesia Linux kernel privilege escalation (CVE-2026-46300) to root firewalls and drop PHP webshells, per Dream. Using FOFA, the actor narrowed 19,000 firewalls to 240 targets and rooted 24 on 23-24 October. On two US government-affiliated devices it used a reverse SSH tunnel, hit the firewall management server, and attempted LDAP and Active Directory abuse.

PHPLinux kernelSSH+2
CVE-2026-109618CVE-2026-109619CVE-2026-46300+7

Threat Intel, Offensive Security· Published and added 28 Oct 2026

akamai.comarticle🛡️ Security

TLP Is Not a Suggestion

Akamai SIG argues that vendors and researchers broke embargo norms during the October 2026 PHP2Shell leak, when the PHP fix shipped a day early on 21 October. It explains the four TLP 2.0 labels, tabulates past embargo breaks (Heartbleed, a collapsed six-month kernel-era embargo, the Alibaba Cloud and MIIT case), and lists seven practices, such as no proofs of concept or CVE numbers before the fix.

PHP
CVE-2026-111497PHP2ShellTraffic Light Protocol+11

other· Added 30 Oct 2026, published 28 Oct 2026

wiz.ioarticle🛡️ Security

PHP2Shell: Exploitation Attempts and Remediation Trends

Wiz Research follow-up on PHP2Shell (CVE-2026-109618, CVE-2026-109619) after the 21 October 2026 disclosure. Honeypot data shows two variants of an open source exploit kit, one stopped by post_max_size and the other by failed memory leaks and worker pinning, plus PHP2Shell-branded tools that rely on session poisoning and LFI. Daily exposed vulnerable machines fell about 67%.

PHPApacheRoundcube
CVE-2026-109618CVE-2026-109619PHP2Shell+7

Threat Intel, Offensive Security· Published and added 27 Oct 2026

blog.cloudflare.comarticle🛡️ Security

Introducing the Cloudflare PHP Capture the Flag challenge

The Cloudflare PHP Capture the Flag challenge is a HackerOne bug bounty CTF. Researchers must bypass Cloudflare WAF rules protecting CVE-2026-109618 and CVE-2026-109619 (PHP2Shell) on stock PHP 8.5.11 with Apache mod_php in a Cloudflare Container, get RCE, and read /flag. The post lists scope (POST to /php/* only), report requirements and duplicate rules, which count only materially distinct WAF bypasses.

CloudflarePHPHackerOne+1
CVE-2026-109618CVE-2026-109619PHP2Shell+1

AppSec, Offensive Security· Added 29 Oct 2026, published 27 Oct 2026

aikido.devarticle🛡️ Security

How to patch PHP2Shell with free Aikido Images

Aikido Images are free patched PHP container images on public ECR (public.ecr.aws/aikido-dev/php) that backport the PHP2Shell fixes for CVE-2026-109618 and CVE-2026-109619 into release lines 5.5 to 8.5, except 8.0. Upstream fixed 8.2 to 8.5 in October 2026 and left 8.1 and older unpatched. The post shows docker pull and Dockerfile FROM changes, then rebuild, restart, session.upload_progress.enabled=0 and compromise checks.

PHPDockerAikido Security+1
CVE-2026-109618CVE-2026-109619PHP2Shell

DevSecOps, AppSec· Published and added 26 Oct 2026

x.comthread🛡️ Security

Trail of Bits (@trailofbits) on X

Trail of Bits post on PHP2Shell, an exploit that gives a shell on MediaWiki, Symfony, Laravel and phpBB. They confirmed it on pre-patch PHP 8.2 to 8.5. An update says it is production-grade: it works with stock php.ini-production, display_errors off, multiple workers, ASLR and load, on ARM64 and x86-64, and reaches root on Apache/mod_php and nginx/php-fpm. No CVE or technical root cause is given.

PHPWordPressLaravel+3
PHP2ShellTrail of Bits

Offensive Security, AppSec· Added 27 Oct 2026, published 26 Oct 2026

orca.securitywriteup🛡️ Security

PHP2Shell: From the attacker’s perspective

PHP2Shell is the public exploit for CVE-2026-109618 (corrupted internal state at the memory limit, allowing hijack during cleanup) and CVE-2026-109619 (double free used to leak memory and defeat ASLR). Orca ran the GitHub tool unchanged against an unpatched PHP server and got command execution. It then built its own exploit with AI from the patch, which worked on PHP 8.4.26 and WordPress. Fixed in 8.2.35, 8.3.36, 8.4.27 and 8.5.12.

PHPWordPressGitHub
CVE-2026-109618CVE-2026-109619PHP2Shell+3

Offensive Security, AI Security, AppSec· Published and added 26 Oct 2026

securityweek.comarticle🛡️ Security

Industrial Vendors Check Products for PHP2Shell Vulnerabilities

PHP2Shell (CVE-2026-109618 and CVE-2026-109619) are critical unauthenticated RCE flaws in the PHP engine, patched on 21 October 2026 in PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35. Industrial vendors including Schneider Electric, Siemens, ABB, B&R, Johnson Controls, Belden, HMS Networks and Wibu-Systems have confirmed affected OT products, with fixed versions or mitigations listed. Rockwell Automation and Hitachi Energy were still assessing, and Moxa reported no impact.

PHPCloudflareDokuWiki+1
CVE-2026-109618CVE-2026-109619PHP2Shell+11

AppSec, Threat Intel· Published and added 26 Oct 2026

securityweek.comarticle🛡️ Security

PHP2Shell Exploitation Moves From Probes to Working Shells

PHP2Shell exploitation (CVE-2026-109618, CVE-2026-109619) reached working shells on 24 October 2026, when Perplexity researcher Adel Karimi's honeypots (PHP 8.4.26, Apache mod_php, single worker) logged 35 shells across three servers. Attackers used a four-stage HTTP chain: memory exhaustion, memory leak, then shell command execution, matching a public PoC. No second-stage payload was seen, and CISA had not added the flaws to KEV as of 26 October.

PHPApache
CVE-2026-109618CVE-2026-109619PHP2Shell+4

Threat Intel, AppSec· Published and added 26 Oct 2026

securitylabs.datadoghq.comarticle🛡️ Security

Code security for new coders

Code security for new coders is a Datadog Security Labs primer for vibe coders on first-party versus third-party code, hardcoded secrets and software supply chain risk (vulnerable and malicious dependencies). It lists security questions to put to a coding agent before and after code is written. It also defines SCA, SAST, IAST, DAST, IaC scanning and secret scanning, and cites the PHP2Shell vulnerabilities.

Datadog Code SecurityGuardDogSupply Chain Firewall+1
PHP2ShellOWASP

Learning, AppSec, Supply Chain· Added 29 Oct 2026, published 26 Oct 2026

interconnects.aitalk🧠 AI

Podcast: Kimi K3.1 Pro, the new cyber reality, and Muse musings

Interconnects podcast episode in which Nathan Lambert and Florian Brand discuss the Kimi K3.1 Pro release (about 3 trillion parameters, weights due by November 4th). They cover its Artificial Analysis score against weaker long-horizon results, Moonshot's choice to down-weight offensive cyber capability, and the PHP2Shell and LiteLLM incidents. They also cover abliterated model APIs, trusted-access cyber programs, Anthropic's junior hiring and Florian's use of the Muse agent.

PHPLiteLLMWordPress+7
KimiMoonshot AIKimi K3+28

models, ai-policy, evals· Published and added 25 Oct 2026

interconnects.aitalk🛡️ Security

Podcast: Kimi K3.1 Pro, the new cyber reality, and Muse musings

Interconnects podcast with Nathan Lambert and Florian Brand on Kimi K3.1 Pro and the AI cyber landscape. Kimi says it down-weighted cyber data in mid-training so its open weights do not extend offensive capability. They discuss the PHP2Shell remote code execution bug, the repeat LiteLLM compromise from an API key left in GitHub for five months, abliterated model APIs, and trusted-access programs from OpenAI and Anthropic. The transcript was truncated at the very end.

Kimi K3.1 ProLiteLLMPHP+3
PHP2ShellPatch the PlanetPHP Foundation+10

AI Security, other· Published and added 25 Oct 2026

galaxy.comarticle🛡️ Security

Weekly Research Brief: PHP Vulnerability; Objections to OKX-ICE’s Stock Tokenization; Solana Alpenglow Ships

Galaxy Research's weekly brief includes a section on PHP2Shell, two decade-old PHP remote code execution bugs affecting versions back to 5.4, patched in an emergency release. It reports an Amazon honeypot exploit attempt four days before disclosure, thousands of attempts in the 10 hours before the patch per Cloudflare's Matthew Prince, and NSA and FBI offline advice. The author argues the bugs were found with GPT-5.6 Sol and that defence must become agentic. It also lists the week's other incidents, including a CVSS 10.0 GitLab bug and eMudhra's guessable private keys.

PHPWordPressOpenAI+3
PHP2ShellPatch the PlanetCalif+7

Threat Intel, AI Security· Added 24 Oct 2026

cisa.govadvisory🛡️ Security

CISA: Critical Vulnerabilities in PHP Require Immediate Patching

CISA alert on CVE-2026-109618 and CVE-2026-109619 ("php2shell"), unauthenticated remote code execution flaws affecting PHP installations serving web requests, including mod_php, PHP-FPM, php-cgi, FrankenPHP and LiteSpeed. Fixed in PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35. Updated 23 October 2026 with a Sigma rule, partner advisories (NSA, NCSC-UK, ASD ACSC, NCSC-NL, NCSC-NZ, Cyber Centre) and guidance to inventory PHP, patch internet-facing systems first, and watch for PHP workers spawning shells. No in-the-wild exploitation had been observed.

PHPApachePHP-FPM+3
CVE-2026-109618CVE-2026-109619PHP2Shell+2

AppSec, Blue Team & Detection· Added 24 Oct 2026

endorlabs.comarticle🛡️ Security

Everything, everywhere, all at once… the week software broke | Endor Labs

Endor Labs roundup of the 20 to 21 October 2026 patch wave: eMudhra certificate authority keys that anyone can recover, PHP2Shell (CVE-2026-109618, CVE-2026-109619), Node2Shell (CVE-2026-111497) and malware in LiteLLM 1.107.0. It lists fixed versions (PHP 8.2.35 to 8.5.12, Node.js 22.23.4, 24.22.1, 26.12.1, LiteLLM back to 1.106.2) and explains why many separate trust-store copies each need updating. It closes with advice on triage, remediation and SBOM/VEX reporting.

PHPNode.jsLiteLLM+3
CVE-2026-109618CVE-2026-109619CVE-2026-111497+3

Supply Chain, AppSec· Published and added 24 Oct 2026

horizon3.aiadvisory🛡️ Security

CVE-2026-109618 / CVE-2026-109619 | NodeZero Rapid Response Check Now Available

PHP2Shell is the name for CVE-2026-109618 and CVE-2026-109619, critical unauthenticated RCE flaws in PHP core fixed on 21 October 2026 in PHP 8.2.35, 8.3.36, 8.4.27 and 8.5.12. The page explains the out-of-memory corruption and stale global state causes, mod_php and PHP-FPM exposure, interim mitigations, hunting guidance, exploitation reports from October 2026, and the 23 October CVE-2026-115560 upload-progress advisory. Horizon3 also announced a non-exploiting NodeZero check.

PHPPHP-FPMApache+3
CVE-2026-109618CVE-2026-109619CVE-2026-115560+5

AppSec, Blue Team & Detection· Added 29 Oct 2026, published 23 Oct 2026

orca.securityarticle🛡️ Security

PHP2Shell: What This Week Tells Us About the Web We Built

PHP2Shell is the name for two unauthenticated remote code execution flaws, CVE-2026-109618 and CVE-2026-109619 (CVSS v4 9.2), in the PHP engine back to version 5.4. The post covers the leaked October 2026 embargo, AI-assisted exploit building by Calif and others, patch availability by PHP version, and a 72-hour and quarterly response plan covering inventory, patching, secret rotation and edge virtual patching. It ends with a short Orca product section.

PHPWordPressOrca Security
CVE-2026-109618CVE-2026-109619PHP2Shell+6

Blue Team & Detection, AppSec, GRC· Published and added 23 Oct 2026

securityweek.comarticle🛡️ Security

Mirai Botnet Operators Join PHP2Shell Attacks as ASLR Bypass Exploits Emerge

PHP2Shell (CVE-2026-109618 and CVE-2026-109619, CVSS v4.0 9.2) are unauthenticated RCE bugs in PHP, patched on 21 October 2026. Sophos, Arctic Wolf and Hunt.io tie exploitation attempts to the Potassium Mirai variant, and VulnCheck built an ASLR-bypassing exploit. SOCRadar and Hunt.io found an exposed attacker server, and Qualys data shows about 110 million instances on end-of-life PHP. No confirmed compromise exists.

PHPApacheWiz+1
CVE-2026-109618CVE-2026-109619PHP2Shell+14

Threat Intel, AppSec, Offensive Security· Published and added 23 Oct 2026

x.comadvisory🛡️ Security

Xavier Rivera (@XavierRiveraX) on X

CVE-2026-115560 is a PHP code execution bug reported two days after the PHP2Shell emergency patches. The post says those releases do not fix it and no emergency fix is planned. Only apps that switch session.serialize_handler to php via ini_set() before session_start() are exposed. The mitigation is session.upload_progress.enabled=0, which also covers anyone who applied it for the 21 October advisory. The post gives no technical root-cause detail.

PHP
CVE-2026-115560PHP2Shell

AppSec· Added 25 Oct 2026, published 23 Oct 2026

latent.spacearticle🧠 AI

[AINews] Black October

AINews issue for 21-22 October 2026, built from 12 subreddits and 544 Twitter accounts. It leads with "Black October", a 48-hour run of AI-found vulnerability disclosures (PHP2Shell, a GitLab CVSS 10 flaw, a LiteLLM 1.107.0 password stealer, eMudhra CA keys). It also covers MiniMax M3.1 Flash, Carbon-X and Flint releases, Artificial Analysis coding-agent and CritPt v2 results, and a METR/Redwood audit of OpenAI monitoring.

vLLMLiteLLMPHP+14
Latent SpaceAINewsAnthropic+43

models, evals, ai-safety· Published and added 23 Oct 2026

x.comthread🛡️ Security

Marcus Hutchins (@MalwareTechBlog) on X

MalwareTech thread arguing that many public "php2shell" exploits for CVE-2026-109618/CVE-2026-109619 are LLM hallucinations. The code shown is PHP session poisoning used to exploit local file inclusion in PHP apps, not a PHP vulnerability. It shares only the PHP_SESSION_UPLOAD_PROGRESS feature with the CVEs. Honeypot traffic shows non-working attempts, and AI-assisted triage wrongly confirmed mass exploitation. The real bug works only on a few PHP versions with specific configurations. Mitigation is setting session.upload_progress.enabled to Off.

PHPGitHubLLM
CVE-2026-109618CVE-2026-109619PHP2Shell+5

AppSec, Offensive Security, AI Security· Added 24 Oct 2026, published 23 Oct 2026

calif.iowriteup🛡️ Security

PHP2Shell: pre-auth RCE via PHP memory-limit fatal errors (CVE-2026-109618/109619)

PHP2Shell is Calif's writeup of pre-auth RCE in PHP (CVE-2026-109618, CVE-2026-109619) triggered by memory_limit fatal errors that leave dangling state. It covers a HashTable bucket bug in _zend_hash_str_add_or_update_i, a Session upload-progress stale-pointer bug, and an unserialize destructor-list primitive that reaches PHP-FPM. It lists affected apps (WordPress, Drupal, Joomla, Magento and others) and gives temporary mitigations.

PHPWordPressnginx+1
CVE-2026-109618CVE-2026-109619PHP2Shell+4

AppSec, Offensive Security· Added 23 Oct 2026

horizon3.aiarticle🛡️ Security

PHP2Shell Exposure Depends on More Than Whether You Use PHP

Horizon3.ai post on assessing exposure to PHP2Shell (CVE-2026-109618, CVE-2026-109619), two memory-handling flaws in PHP. It says affected PHP may be bundled in third-party products, containers or managed hosting, and that finding it shows a remediation need, not proven exploitability. It lists questions to ask hosting providers and says Horizon3.ai has validated exploitation under specific preconditions that are still being characterized.

PHP
CVE-2026-109618CVE-2026-109619PHP2Shell

AppSec, Offensive Security· Added 29 Oct 2026, published 22 Oct 2026

tldrsec.comarticle🛡️ Security

[tl;dr sec] #351 - PHP2Shell, Autopatching Skills, AWS Pathrunner

tl;dr sec #351 is a weekly security newsletter. Clint Gibler describes working with OpenAI, Calif, Wiz and the PHP maintainers on the PHP2Shell unauthenticated RCE disclosure, which affects 13 years of PHP. It also covers Datadog's pathrunner AWS IAM escalation framework, Trail of Bits' patching-bugs and regression-hunt Codex plugins, XBOW finding de-duplication, backdoored open-weight models, and CREBench.

PHPAWS IAMCodex+3
PHP2ShellPatch the PlanetCalif+10

AppSec, AI Security, Cloud & Infra· Added 30 Oct 2026, published 22 Oct 2026

securityweek.comarticle🛡️ Security

Tech and Security Companies Respond to PHP2Shell Vulnerabilities

SecurityWeek roundup of responses to PHP2Shell, two critical unauthenticated RCE flaws (CVE-2026-109618, CVE-2026-109619) fixed in PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35 on 21 October 2026. It covers the exploitation timeline (first attempt 17 October), vendor exposure checks, Red Hat's lower 8.1 score against NVD's 9.8, detections from Cisco Talos, CrowdStrike and Corelight, and government alerts.

PHPAWSGoogle Cloud+3
CVE-2026-109618CVE-2026-109619PHP2Shell+6

Blue Team & Detection, AppSec· Published and added 22 Oct 2026

securityweek.comarticle🛡️ Security

PHP2Shell Exploitation Started Days Before Patches

PHP2Shell (CVE-2026-109618 and CVE-2026-109619) is a pair of critical PHP remote code execution flaws. Amazon saw the first exploitation on 17 October 2026, four days before patches on 21 October, and Cloudflare logged millions of attempts after disclosure. Censys, VulnCheck and VirusTotal counted over 1 million unpatched PHP hosts, and CISA urged updating to PHP 8.5.12, 8.4.27, 8.3.36 or 8.2.35.

PHPCloudflareVirusTotal+1
CVE-2026-109618CVE-2026-109619PHP2Shell+4

Threat Intel, AppSec· Published and added 22 Oct 2026

latent.spacearticle🧠 AI

[AINews] OpenAI’s Patch the Planet program is 1 of 2 parties to discover PHP2Shell vulnerabilities in core PHP affecting 70% of the web, using GPT-5.6 Sol; coordinated response over 2 months

AINews issue for 20-21 October 2026. The top story covers PHP2Shell (CVE-2026-109618 and CVE-2026-109619), two PHP-engine memory-corruption bugs found separately by Calif researchers using GPT-5.6 Sol under OpenAI's Patch the Planet and by Wiz, followed by two months of coordinated remediation. It also covers the Flint coding MoE, DeepSeek's DeepInfer, TorchTPU, eval critiques and agent product launches. The text is truncated.

PHPWordPressDrupal+11
CVE-2026-109618CVE-2026-109619OpenAI+35

models, inference, evals· Published and added 22 Oct 2026

latent.spacearticle🧠 AI

[AINews] OpenAI’s Patch the Planet program is 1 of 2 parties to discover PHP2Shell vulnerabilities in core PHP affecting 70% of the web, using GPT-5.6 Sol; coordinated response over 2 months

This AINews issue (20 to 21 October 2026) leads with PHP2Shell, two PHP-engine memory-corruption bugs (CVE-2026-109618 and CVE-2026-109619). Calif researchers found them with GPT-5.6 Sol under OpenAI's Patch the Planet, and Wiz reportedly found them independently with Gemini 4 Argon. It reconstructs the two-month coordinated response, Cloudflare WAF stopgaps and NSA guidance, and the dispute over vetted researcher access to models. Only the first 40,000 of 114,281 characters were reviewed.

PHPWordPressDrupal+6
CVE-2026-109618CVE-2026-109619OpenAI+18

ai-policy, models· Added 23 Oct 2026, published 22 Oct 2026

latent.spacearticle🛡️ Security

[AINews] OpenAI’s Patch the Planet program is 1 of 2 parties to discover PHP2Shell vulnerabilities in core PHP affecting 70% of the web, using GPT-5.6 Sol; coordinated response over 2 months

AINews issue of 20-21 October 2026 whose top story reconstructs PHP2Shell (CVE-2026-109618, CVE-2026-109619), two PHP-engine memory-corruption bugs with reported pre-auth RCE against WordPress, Drupal and Joomla. It covers the two-month coordinated disclosure, independent discovery by Calif/OpenAI (GPT-5.6 Sol) and Wiz, Cloudflare WAF stopgaps and NSA guidance. It flags missing primary sources: fixed versions, CVSS and leak details.

PHPWordPressDrupal+3
CVE-2026-109618CVE-2026-109619PHP2Shell+9

AppSec, AI Security· Published and added 22 Oct 2026

latent.spacearticle🛡️ Security

[AINews] OpenAI’s Patch the Planet program is 1 of 2 parties to discover PHP2Shell vulnerabilities in core PHP affecting 70% of the web, using GPT-5.6 Sol; coordinated response over 2 months

AINews issue of 20-21 October 2026 whose top story reconstructs PHP2Shell, two PHP-engine memory-corruption flaws (CVE-2026-109618 and CVE-2026-109619) with reported pre-auth RCE against WordPress, Drupal and Joomla. It covers the two-month coordinated response, separate discovery by Calif/OpenAI (GPT-5.6 Sol) and Wiz (Gemini 4 Argon), Cloudflare's WAF stopgap and NSA guidance. It lists open gaps: fixed versions, leak details, exploitation versus scanning.

PHPWordPressDrupal+3
CVE-2026-109618CVE-2026-109619PHP2Shell+12

AppSec, AI Security· Added 23 Oct 2026, published 22 Oct 2026

aws.amazon.comarticle🛡️ Security

Using AWS WAF to apply mitigations for PHP2Shell RCE vulnerabilities (CVE-2026-109618 and CVE-2026-109619)

AWS Security Blog guide to mitigating the PHP2Shell unauthenticated RCE flaws (CVE-2026-109618 and CVE-2026-109619, CVSS v4.0 9.2) with AWS WAFv2 rules. It covers rules for the PHP_SESSION_UPLOAD_PROGRESS trigger, blocking multipart/form-data, body size caps and rate limits, plus body inspection limits. It lists PHP fixes (8.5.12, 8.4.27, 8.3.36, 8.2.35) and server settings, and stresses WAF only reduces exposure.

AWS WAFPHPAWS+1
CVE-2026-109618CVE-2026-109619PHP2Shell+4

Cloud & Infra, Blue Team & Detection, AppSec· Published and added 22 Oct 2026

eliastaylor.comarticle🛡️ Security

There isn't an easy exploit for this PHP vulnerability

Blog post from 21 October 2026 arguing that the recent PHP vulnerability (UAF chaining, tracked as PHP2Shell) has no easy working exploit, unlike Log4Shell, Heartbleed, Shellshock or the Rails YAML bug. The author says the many GitHub PoCs fail against vanilla PHP in Docker, or depend on a local-file-inclusion precondition or on an LLM modifying the target server. It also reflects on LLM-driven uniform judgement.

PHPDockerGitHub+2
CVE-2026-109618CVE-2026-109619PHP2Shell+5

AppSec, Offensive Security, AI Security· Added 22 Oct 2026, published 21 Oct 2026

aws.amazon.comarticle🛡️ Security

Amazon Threat Intelligence identifies PHP2Shell exploitation prior to public disclosure in MadPot

Amazon Threat Intelligence reports PHP2Shell exploitation (CVE-2026-109618, CVE-2026-109619) seen in MadPot honeypot telemetry on 17 October 2026, four days before the 21 October disclosure, from anonymization-network IPs. Multiple actors and PoCs appeared within hours of the patch. It recommends upgrading PHP, hunting for PHP_SESSION_UPLOAD_PROGRESS in multipart POSTs, and investigating from the earliest exploitation date, with patch SLAs measured in hours.

PHPAWS
CVE-2026-109618CVE-2026-109619PHP2Shell+2

Threat Intel, AppSec, Blue Team & Detection· Published and added 21 Oct 2026

aws.amazon.comadvisory🛡️ Security

PHP web runtimes (CVE-2026-109618 and CVE-2026-109619)

AWS bulletin 2026-143-AWS covers CVE-2026-109618 and CVE-2026-109619, critical PHP web runtime flaws that let an unauthenticated remote caller run code, read process data or cause denial of service. Fixed in PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35; PHP 5.4 to 8.1 get no fix. It gives status for WorkMail, Elastic Beanstalk, Amazon Linux and Lightsail, plus AWS WAF rules, including a custom "PHP2Shell" rule matching PHP_SESSION_UPLOAD_PROGRESS and PHPSESSID.

PHPAWSAWS WAF+3
CVE-2026-109618CVE-2026-109619PHP2Shell+1

AppSec, Cloud & Infra· Added 22 Oct 2026, published 21 Oct 2026

protos.comarticle🛡️ Security

Remotely exploitable PHP bug found on 70% of world’s websites

PHP2Shell is a pair of unauthenticated remote code execution flaws in PHP, CVE-2026-109618 and CVE-2026-109619, found by Calif using OpenAI's GPT-5.6 Sol during an OpenAI-funded audit. Fixes ship in PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35, with backports for 7.4-8.1 rolling out, while PHP 7 and 5 sites stay unpatched. Wiz confirmed the flaws; Cloudflare applied a stopgap and Finnish and Dutch government sites went offline.

PHPCloudflareOpenAI+1
CVE-2026-109618CVE-2026-109619PHP2Shell+5

AppSec, AI Security, Threat Intel· Published and added 21 Oct 2026

securityweek.comarticle🛡️ Security

PHP2Shell Patches Land as First Exploitation Attempts Hit Sensors

PHP2Shell is a pair of critical PHP core flaws, CVE-2026-109618 (out-of-memory corruption) and CVE-2026-109619 (stale global state), both CVSS 9.2 and giving unauthenticated RCE, confirmed on Apache with mod_php. Fixes shipped in PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35, with backports for 7.4 to 8.1. Exploitation attempts were reported by watchTowr, Hadrian, Patchstack, Cloudflare and Vega after a leak moved disclosure up from 22 October 2026 to one day earlier.

PHPApachemod_php+3
CVE-2026-109618CVE-2026-109619PHP2Shell+9

AppSec, Threat Intel· Published and added 21 Oct 2026

endorlabs.comadvisory🛡️ Security

PHP2Shell: Critical vulnerabilities in PHP (CVE-2026-109618, CVE-2026-109619) | Endor Labs

PHP2Shell is the name for two critical PHP core memory-safety flaws, CVE-2026-109618 and CVE-2026-109619, that allow unauthenticated remote code execution. Fixes ship in PHP 8.2.35, 8.3.36, 8.4.27 and 8.5.12. Wiz researchers demonstrated RCE against WordPress, Drupal and Joomla, and Apache with mod_php is the highest risk. The post covers inventory, container rebuilds, Cloudflare WAF rules and temporary exposure reduction.

PHPWordPressDrupal+3
CVE-2026-109618CVE-2026-109619PHP2Shell+4

AppSec, DevSecOps· Published and added 21 Oct 2026

socket.devarticle🛡️ Security

PHP Patches Critical RCE Vulnerabilities, Organizations Urged to Take Unpatched Sites Offline

PHP2Shell is a pair of memory-safety flaws in the PHP engine, CVE-2026-109618 and CVE-2026-109619 (CVSS v4.0 9.2), fixed on 21 October 2026 in PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35. Unauthenticated requests can reach code execution, most readily through Apache mod_php, and Cloudflare reports active attack traffic. The post covers W3Techs data showing about 48.5% of PHP sites on end-of-life branches, the leak timeline, and the need to patch the runtime itself.

PHPCloudflareWordPress+2
CVE-2026-109618CVE-2026-109619PHP2Shell+5

AppSec, Threat Intel· Published and added 21 Oct 2026

blog.talosintelligence.comadvisory🛡️ Security

Two critical RCEs in PHP core

Cisco Talos advisory on "php2shell", two unauthenticated RCE flaws in PHP core, CVE-2026-109618 and CVE-2026-109619 (CVSS v4.0 9.2), affecting every build since PHP 5.4. One flaw is an out-of-memory handling bug leaving request data partly initialized; the other reuses stale state after free. PHP 8.1 and older get no patch (about 50% of PHP systems). Includes ini-level mitigations and Snort SIDs 67359 and 67360. No exploitation seen as of 21 October 2026.

PHPWordPressCVSS
CVE-2026-109618CVE-2026-109619php2shell+2

AppSec, Blue Team & Detection· Published and added 21 Oct 2026

watchtowr.comadvisory🛡️ Security

PHP Remote Code Execution ("PHP2Shell" CVE-2026-109618 & CVE-2026-109619)

PHP2Shell is the name for CVE-2026-109618 (out-of-memory corruption) and CVE-2026-109619 (stale global state), two unauthenticated PHP remote code execution flaws rated CVSS 4.0 9.2. Details leaked before the 21 October 2026 patch release, and watchTowr's honeypots saw exploitation. The page lists fixed versions (8.5.12, 8.4.27, 8.3.36, 8.2.35), states that .ini mitigations do not work, gives a timeline, and describes compromise checks.

PHPApacheFrankenPHP+2
CVE-2026-109618CVE-2026-109619PHP2Shell+3

AppSec, Threat Intel· Added 28 Oct 2026, published 21 Oct 2026

blog.cloudflare.comarticle🛡️ Security

Cloudflare deploys protections against php2shell vulnerability

Cloudflare describes its WAF protections for php2shell (CVE-2026-109618 and CVE-2026-109619), two PHP runtime memory-handling flaws affecting PHP 5.4 and later that can cause denial of service, remote code execution and data exposure. Rules shipped 21 October 2026, about 9 hours before disclosure, using a new "full transaction detection" that matches request and origin response together. It lists ruleset IDs and says patching PHP is still required.

PHPCloudflareWordPress
CVE-2026-109618CVE-2026-109619PHP2Shell+2

Blue Team & Detection, AppSec· Added 22 Oct 2026, published 21 Oct 2026

orca.securityadvisory🛡️ Security

Critical PHP “PHP2Shell” RCE Vulnerabilities Allow Unauthenticated Remote Code Execution (CVSS 9.2)

PHP2Shell is the informal name for CVE-2026-109618 and CVE-2026-109619 (CVSS v4.0 9.2), unauthenticated remote code execution flaws in the PHP core runtime. Patches for branches 8.2 to 8.5 were scheduled for 21 October at 14:00 UTC, while PHP 8.1 and older get no fix; about 884,000 internet-facing hosts run those versions. watchTowr reproduced CVE-2026-109618, no public PoC existed at writing, and Sansec expects mass exploitation within 15 minutes of release.

PHP
CVE-2026-109618CVE-2026-109619PHP2Shell+4

AppSec· Published and added 21 Oct 2026

blog.cloudflare.comarticle🛡️ Security

Introducing full transaction detection for Cloudflare WAF

Cloudflare announces full transaction detection and response-phase rules for its WAF. Detections evaluate an HTTP request together with the origin's response, so exploitation can be confirmed (for example, path traversal returning a config file) and the response replaced with a 403 block page. Covers managed and custom rules, the limit of three custom response rules, no response-body matching yet, and a first managed rule for php2shell. Available on all plans, including Free.

Cloudflare
PHP2Shellpath traversal

AppSec, Blue Team & Detection· Added 29 Oct 2026, published 21 Oct 2026

wiz.iowriteup🛡️ Security

PHP2Shell: AI uncovers critical RCE vulnerabilities affecting 70% of the Internet

PHP2Shell is Wiz Research's disclosure of memory-safety bugs in core PHP, grouped under two CVEs (up to CVSS 9.2) and fixed in patched releases on 21 October 2026. The post details four bugs, all triggered by out-of-memory fatal errors that leave stale state: an upload-progress unserializer use-after-free, a session-ID memory disclosure, a fatal-error backtrace use-after-free and an OPcache type confusion. It describes unauthenticated RCE on WordPress, Drupal and Joomla, plus detection signals and a disclosure timeline.

PHPWordPressDrupal+3
PHP2ShellWiz ResearchCalif+6

AppSec, Offensive Security, AI Security· Published and added 21 Oct 2026

github.comrepo🛡️ Security

eness/php2shell-CVE-2026-109618-CVE-2026-109619-PoC

php2shell is the name given to two critical pre-auth remote code execution flaws, CVE-2026-109618 and CVE-2026-109619, in PHP core's session upload progress handler (php_session_rfc1867_callback), where zend_hash_update frees live zval pointers that are later reclaimed and redirected into zend_call_function to run zif_system. This repository ships poc_109618.py, a fully automated four-stage HTTP exploit that leaks ASLR offsets via Set-Cookie headers against php:8.4.26-apache on Debian Bookworm, along with a root-cause C source patch, mitigation scripts to disable session.upload_progress, and WAF/ModSecurity/Lighttpd/Apache rules plus detection guidance for anomalous PHP worker child processes. Confirmed PHP versions include 8.4.4 and 8.2.34, with EOL branches (5.x, 7.x, 8.0, 8.1) left without official vendor patches.

PHPDockerCloudflare+1
CVE-2026-109618CVE-2026-109619PHP2Shell+6

Offensive Security, AppSec, Blue Team & Detection· Added 23 Oct 2026, published 21 Oct 2026

github.comrepo🛡️ Security

ikow/php2shell-poc

php2shell-poc is a proof-of-concept and detection toolkit for CVE-2026-109618 and CVE-2026-109619, two PHP vulnerabilities tied to session.upload_progress handling and a Zend engine out-of-memory bailout path affecting PHP 5.4.0 through 8.5.11. The repository includes three working exploit chains, a Docker-based lab (PHP-FPM, nginx, Apache mod_php) for reproduction, and pre-built Suricata, Sigma, ModSecurity, and Lua detection rules. The author recommends disabling session.upload_progress as an interim mitigation, noting the underlying memory corruption requires a full PHP patch to fix.

PHPWordPressDocker+3
CVE-2026-109618CVE-2026-109619GHSA-w8hw-w9fx-j79w+3

AppSec, Offensive Security, Blue Team & Detection· Added 23 Oct 2026, published 21 Oct 2026

securityweek.comarticle🛡️ Security

PHP2Shell: Mass Exploitation Looms for Leaked Critical PHP Flaws

PHP2Shell is the name given to two critical PHP flaws, CVE-2026-109618 and CVE-2026-109619 (CVSS 9.2 each), that could allow unauthenticated remote code execution. Details leaked before PHP's planned patch release on 21 October 2026 at 14:00 UTC. Reports say all versions from PHP 5 onward are affected and one flaw may be a use-after-free; watchTowr reproduced CVE-2026-109618, and Sansec expects mass exploitation within 15 minutes of the patch.

PHPCVSS
CVE-2026-109618CVE-2026-109619PHP2Shell+4

AppSec, Threat Intel· Published and added 21 Oct 2026

huntress.comadvisory🛡️ Security

Rapid Response: php2shell, Leaked Critical PHP Vulnerabilities (CVE-2026-109618 & CVE-2026-109619)

Huntress rapid-response post on php2shell, two leaked critical PHP core vulnerabilities (CVE-2026-109618 and CVE-2026-109619, CVSS v4.0 9.2 each) reported as remote code execution. The PHP team moved its security release to 21 October 2026, 14:00 UTC, after the leak. It lists hunting cues such as php-fpm, php-cgi or apache2 spawning shells, interpreters or download tools, plus inventory and patch steps. No root cause, affected versions, PoC or IOCs were public at writing.

PHPHuntressWordPress+2
CVE-2026-109618CVE-2026-109619php2shell+4

Blue Team & Detection, Threat Intel, AppSec· Published and added 21 Oct 2026

aikido.devadvisory🛡️ Security

Critical vulnerabilities in PHP (PHP2SHELL)

PHP2SHELL is Aikido Security's advance notice of two critical remote code execution flaws in PHP itself, CVE-2026-109618 and CVE-2026-109619, both CVSS v4.0 9.2, with all versions treated as affected. The PHP security team will release fixes at 14:00 UTC on 21 October 2026, a day early after details leaked on 20 October. The post withholds exploitation details and workarounds.

PHPCVSS
CVE-2026-109618CVE-2026-109619PHP2SHELL+1

AppSec· Published and added 21 Oct 2026

securitylabs.datadoghq.comwriteup🛡️ Security

PHP2Shell - Critical vulnerabilities in PHP (CVE-2026-109618, CVE-2026-109619): detection, analysis, and remediation

PHP2Shell is Datadog Security Labs' analysis of two critical PHP RCE flaws, CVE-2026-109618 and CVE-2026-109619 (CVSS v4.0 9.2), disclosed 21 October 2026. It walks through a reproduced exploit on PHP 8.5.11 (heap grooming, a fake array, and a destructor calling system()) and the stale-state use-after-free. It lists fixed versions (8.2.35, 8.3.36, 8.4.27, 8.5.12), partial mitigations, and detection signals across requests, error logs and shell child processes.

PHPApacheCVSS+1
CVE-2026-109618CVE-2026-109619PHP2Shell+5

AppSec, Blue Team & Detection, Offensive Security· Added 29 Oct 2026, published 21 Oct 2026

watchtowr.comadvisory🛡️ Security

Frequently Asked Questions About PHP Remote Code Execution (PHP2Shell CVE-2026-109618 & CVE-2026-109619)

PHP2Shell is the name for CVE-2026-109618 and CVE-2026-109619, two unauthenticated remote code execution flaws in PHP, both CVSS v4.0 9.2. One stems from out-of-memory corruption during request setup, the other from stale global state reused by the next request. watchTowr reports exploitation since 21 October 2026, lists fixed releases (8.5.12, 8.4.27, 8.3.36, 8.2.35) and says PHP 5 is also affected. PHP says no configuration change fully mitigates.

PHPApacheCVSS
CVE-2026-109618CVE-2026-109619PHP2Shell+3

AppSec, Threat Intel· Added 30 Oct 2026, published 20 Oct 2026