- Show HN: Hob - Open-source, on device alternative to Claude Cowork and ChatGPT
Hob is an MIT-licensed desktop app from Frigade that runs open-weight models such as Gemma and gpt-oss locally on Mac, Windows and Linux. It picks the best open-weight model that fits the user's computer and sets it up. It is positioned as a free, private, offline alternative to Claude and ChatGPT for tasks like filling out PDFs and working through documents. The page gives no technical detail on its runtime.
github.comrepoAdded 27 Oct 2026, published 26 Oct 2026π§ AI - chainguard-dev/malcontent
malcontent is Chainguard's open-source malware/supply-chain discovery tool that analyzes binaries (ELF, Mach-O, PE, a.out) and scripting-language source across Linux, macOS and Windows using 14,500+ YARA rules (including third-party rules from Avast, Elastic, FireEye, Mandiant, Nextron and ReversingLabs). Its standout feature is differential analysis ("mal diff"), which compares two versions of a build artifact or OCI image against a known-good baseline to surface newly introduced risky behaviors β the technique the project demonstrates on the 3CX supply-chain compromise by flagging unexpected high-risk changes to libffmpeg. It also supports threshold-based scanning ("mal scan") and unfiltered capability enumeration ("mal analyze"), and is designed to run inside CI/CD pipelines, including air-gapped environments via embedded rules.
github.comrepoAdded 8 Oct 2026π‘οΈ Security - Show HN: NanoMuse β An open-source AI agent for your phone and computer
nanoMuse is an open-source personal AI agent that runs across phone, desktop, and web, built on an on-device sandbox (OpenMinis with proot/Alpine Linux on mobile) and the DeepSeek Harness on desktop with a Python runtime for tool use. Devices share one account and sync conversations through a relay (self-hostable), while the agent proactively acts, retains memory, and pauses before irreversible actions; it is released GPL-3.0-or-later with documentation on install, self-hosting, connectors, and memory.
github.comrepoPublished and added 7 Oct 2026π§ AI - Sigma r2026-07-01 β 20 new detection rules
GitHub release notes for Sigma r2026-07-01, the open-source detection-rule repository, adding 20 new rules (e.g. LSASS crash via Netlogon buffer overflow CVE-2026-41089, TanStack supply-chain attack indicators for Windows/Linux, RedTail cryptominer user-agent detection, AF_ALG kernel crypto API exploit indicator) and updating/fixing dozens of existing rules for ARM64 binary variants, file-sharing domain IOCs, and WMI-based reconnaissance/persistence detection. It's a routine but substantive update to a widely-used blue-team detection content pack.
github.comrepoAdded 3 Oct 2026π‘οΈ Security - graygnatconsole/mcp-audit-tool
mcp-audit-tool is a dependency-light Python CLI that statically scans Claude Desktop, Cursor, Windsurf, Cline, Zed, and VS Code MCP configuration files for security issues, including hardcoded secrets, unpinned/rug-pull packages, pipe-to-shell installers, tool-poisoning via hidden instructions in tool descriptions, filesystem servers rooted at '/', and unauthenticated plaintext HTTP MCP endpoints. It auto-discovers configs across macOS/Linux/Windows, produces a security score/grade plus SARIF 2.1.0 output for GitHub Code Scanning, and is built around the OWASP MCP Top 10 categories with a CI/CD example that fails builds on severity thresholds. The roadmap adds live server probing over stdio/SSE for runtime rug-pull detection and an ML-based prompt-injection classifier for tool descriptions.
github.comrepoPublished and added 26 Sep 2026π‘οΈ Security - Sandyaa β open-source autonomous code auditor that proves bugs with working exploit PoCs
Sandyaa is an open-source autonomous code-audit tool that points at a local directory or git URL and runs end-to-end, driven by the Claude Code CLI (optionally Gemini) with no separate API key required. It uses a Recursive Language Model approach β the model drives a Python REPL to chunk code, spawn sub-LLM queries, and aggregate results β running eight recursive passes (call-chain tracing, data-flow expansion, vulnerability chaining, exploitability proof, etc.) and an attacker-control-reachability analyzer to filter unreachable findings, then writes each finding with a working exploit PoC and an evidence.json linking claims to file/line. Maintained by SecureLayer7, who report using it to surface zero-days; it's alpha-stage, macOS-tested, Linux/WSL2-expected-to-work, and unsupported on native Windows.
github.comrepoAdded 26 Sep 2026π‘οΈ Security - Show HN: CUA-S1 β A System One Model for Computer Use
Cua is an open-source platform for computer-use agents: isolated cloud desktops (Fleets), a Sandbox SDK, local macOS/Linux VM management (Lume), a Cua Driver for controlling native apps/browsers via CLI/MCP/SDKs, and Cua-Bench for building and evaluating computer-use tasks. It also introduces CUA-S1, a family of small specialized "System 1" models that make fast, bounded decisions (e.g., scoring form field values from structured UI/document data) rather than generating agent actions token-by-token, with the first CUA-S1-FORMS model and dataset released on Hugging Face. The project is MIT-licensed with some optional components (cua-som, cua-perception's OmniParser integration) carrying AGPL-3.0 obligations.
github.comrepoAdded 26 Sep 2026, published 19 Sep 2026π§ AI - crypt0p3g/adnullenum
adnullenum is a single-pass Active Directory enumerator that uses anonymous (null) SMB sessions over the \samr and \lsarpc named pipes to pull domain info, password/lockout policy, RID-cycled account inventory, per-user detail, and group membership without credentials. It consolidates what rpcclient, impacket's samrdump.py/lookupsid.py, enum4linux-ng, and NetExec each do separately into one run, falls back to LSA lookups when SAMR is locked down, flags interesting accounts (AS-REP-roastable, PASSWORD_NOT_REQUIRED, unconstrained delegation, etc.), and writes ready-to-use userlist.txt/computerlist.txt plus a reusable RID cache. The README also gives blue-team guidance on closing null-session access (RestrictAnonymousSAM, Pre-Windows 2000 Compatible Access group) and detecting it via Event 4661/4662/4624/5140.
github.comrepoAdded 2 Oct 2026, published 17 Sep 2026π‘οΈ Security - Copy Fail (CVE-2026-31431): 9-year-old Linux kernel LPE found by Theori's Xint Code
A GitHub repository from Theori's Xint Code team detailing CVE-2026-31431, a Linux kernel local privilege escalation bug ("Copy Fail") that had gone undetected for roughly nine years. The researchers confirmed exploitability across current production kernels including Ubuntu 24.04 LTS (6.17.0-1007-aws), Amazon Linux 2023 (6.18.8-9.213.amzn2023), RHEL 10.1 (6.12.0-124.45.1.el10_1), and SUSE 16 (6.12.0-160000.9-default).
github.comrepoAdded 17 Sep 2026π‘οΈ Security - Markakd/Container_escape
A GitHub repository hosting target-specific proof-of-concept exploits for two Linux kernel vulnerabilities, CVE-2026-52910 and CVE-2026-80521 (the latter an AF_UNIX kernel bug also documented in a kernelCTF LTS exploit-chain submission), both usable to break out of container isolation. The project ships a QEMU/Docker-based disposable VM builder (pinned to specific Ubuntu cloud images and kernel versions) so the destructive PoCs can be compiled and detonated only inside throwaway guests rather than on real hosts.
github.comrepoAdded 2 Oct 2026, published 16 Sep 2026π‘οΈ Security - Mintplex-Labs/anything-llm
AnythingLLM is an open-source, MIT-licensed all-in-one LLM application from Mintplex Labs that lets users chat with their documents, run no-code AI agents, and connect to a wide range of LLM providers, embedders, vector databases, and TTS/STT services. It ships as a monorepo (frontend, server, collector, embed widget, browser extension) with multi-user permissioning, MCP compatibility, scheduled tasks, dynamic model routing, and both self-hosted (Docker) and desktop (Mac/Windows/Linux) deployment options.
github.comrepoAdded 23 Sep 2026, published 31 Aug 2026π§ AI - Cloudflare Computer
Cloudflare Computer is a preview virtual filesystem living inside a Durable Object, with authoritative state in SQLite exposed through three pluggable execution backends: a full Linux container mounted via FUSE and capnweb RPC, an isolated shell (just-bash) running in a Dynamic Worker, and isolated JavaScript modules in a fresh Dynamic Worker with scoped fs/git/artifacts access. It's designed as sandboxing infrastructure for AI agents, with examples demonstrating per-backend egress policy controls (none/all/custom) and MCP-based code execution tools, making it relevant to securely isolating and constraining agent/LLM code execution.
github.comrepoAdded 3 Sep 2026, published 25 Aug 2026π‘οΈ Security - archcanary
Archcanary is a read-only, layered detection scanner for Arch Linux (and derivatives like EndeavourOS/Manjaro) that checks installed packages, pacman logs, systemd units, eBPF programs, ld.so.preload, DKMS kernel modules, and npm/bun/yarn/pnpm caches against curated and third-party (aur-audit.wtako.net) threat lists. It was built in direct response to a 2026 AUR supply-chain attack in which commit forgery was used to impersonate maintainers and inject npm/bun install hooks delivering an infostealer (Discord tokens, GitHub PATs, SSH keys, Vault tokens) and a CAP_BPF eBPF rootkit into 1600+ PKGBUILDs, plus a separate Russian-spam PKGBUILD injection campaign. It integrates with yay/paru pre-build hooks, systemd timers, auditd, and Lynis, and originated as a fork/expansion of lenucksi/aur-malware-check.
github.comrepoPublished and added 21 Aug 2026π‘οΈ Security - armourinfosec/Offensive-Linux-Privilege-Escalation
A structured collection of 50+ notes taking a low-privileged Linux foothold to root, covering sudo/SUID misconfigurations, GTFOBins and LD_PRELOAD abuse, the Baron Samedit sudo bug, Linux capabilities, cron/systemd-timer abuse, kernel exploits (DirtyCow, DirtyPipe, OverlayFS, PwnKit), NFS no_root_squash, Docker/LXD namespace escapes, screen/tmux and D-Bus IPC abuse, and credential mining. Each note follows a concept-to-exploitation-to-detection-to-defense format and the repo includes a methodology checklist, hardening guide, two guided labs with a lab-setup script, and skills assessments, published for authorized lab/CTF use under CC BY 4.0.
github.comrepoAdded 2 Oct 2026, published 19 Aug 2026π‘οΈ Security - ITScape / Januscape / Zapscape
ITScape is a guest-to-host escape exploit (CVE-2026-46316) against KVM/arm64, discovered by Hyunwoo Kim (@v4bel), exploiting a race condition in the vGIC-ITS (Interrupt Translation Service) emulation inside the Linux kernel's in-kernel KVM code rather than QEMU userspace. A malicious guest with only EL1 (guest kernel) privilege can trigger the bug via GIC/ITS MMIO to gain host kernel (root) code execution, threatening isolation on multi-tenant arm64 public clouds; the repo includes a reproducible PoC built on the Linux kvm selftest framework and QEMU TCG for safe testing, plus patch/version range and disclosure timeline.
github.comrepoPublished and added 15 Aug 2026π‘οΈ Security - sgkdev/bad_garbage
GitHub repo (sgkdev/bad_garbage) containing a proof-of-concept exploit for CVE-2026-53361, an unprivileged, container-escapable use-after-free in the Linux AF_UNIX socket garbage collector. The bug stems from a race where a concurrent MSG_PEEK on an in-flight socket slips past the gc_in_progress check, letting the GC free a still-referenced socket; the same underlying race has been patched three separate times (CVE-2021-0920, CVE-2026-23394, CVE-2026-53361). The PoC targets systems with 2β7 CPUs and notes that most SLUB cache-armoring/shadowing code was stripped out, leaving occasional collisions in kmalloc-64/anon_vma caches that a user would need to re-armor for near-100% reliability.
github.comrepoAdded 2 Oct 2026, published 10 Aug 2026π‘οΈ Security - Ghidra
Ghidra is a free, open-source software reverse engineering (SRE) framework developed by the NSA, offering disassembly, decompilation, graphing, and scripting across Windows, macOS, and Linux. It supports a wide range of processor architectures and executable formats, can run interactively or in automated/headless mode, and allows extension development via Java or Python (including the bundled PyGhidra). It is one of the primary open-source alternatives to IDA Pro for malware analysis and vulnerability research.
github.comrepoPublished and added 31 Jul 2026π‘οΈ Security - genspark-ai/genoffice
GenOffice is an open-source (Apache-2.0) desktop office suite for macOS/Windows/Linux that opens native .docx/.xlsx/.pptx/PDF/Markdown/HTML files and puts an AI agent inside the editor, applying edits as byte-preserving diffs, tracked changes and live spreadsheet formulas rather than pasted text. It exposes the same engines to coding agents via a `genoffice` CLI, a bundled skill for Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode and Windsurf, and an MCP server with 29 tools (plus an HTTP variant for headless/remote use), and includes a local SQLite full-text file search optionally reranked by TypeSafe's Jev judgment model. Users can bring their own key (Claude, OpenAI, Gemini, DeepSeek, and others) or sign in with Genspark to route model calls through a proxy.
github.comrepoAdded 30 Sep 2026, published 31 Jul 2026π§ AI - Talaria
Talaria is a single-binary, pure-Go Linux privilege escalation scanner that enumerates misconfigurations (SUID/SGID, sudoers, capabilities, cron, Polkit JS rules, systemd EnvironmentFile overrides) and links them into confirmed multi-stage root-escalation chains using an embedded Dijkstra pathfinder. It runs read-only with no disk writes, executes in milliseconds, detects backport-aware 2026 Linux kernel vulnerabilities (Dirty Frag, Fragnesia, Copy Fail, DirtyClone, CIFSwitch, PinTheft, pedit COW), and exports JSON/SARIF for SIEM and GitHub Code Scanning integration.
github.comrepoAdded 3 Sep 2026, published 31 Jul 2026π‘οΈ Security - LSPosed/LSPromise
LSPromise is a GitHub repo and detailed writeup documenting a complete Android privilege-escalation exploit chain from an untrusted local app to root/kernel, with no memory corruption required. It chains a logic bug in Telecom's InCallController.java (CVE-2026-49881) that lets arbitrary code run inside system_server, pivots via ActivityManager reflection into com.android.networkstack to reach the DirtyFrag kernel 1-day (CVE-2026-43500/CVE-2026-43284), and then uses a DirtyPipe-style binary-patching technique (crash_dump, modprobe, vendor_file labeled kernel module) to disable SELinux and launch KernelSU with root. Tested on Pixel 10 running Android 17; the first bug was fixed in the September 2026 security bulletin.
github.comrepoAdded 2 Oct 2026, published 23 Jul 2026π‘οΈ Security - 0x1ceKing/HTB-Certified-Penetration-Testing-Specialist
A GitHub repository compiling personal study notes and cheatsheets for HackTheBox's CPTS (Certified Penetration Testing Specialist) certification, organized by module: network enumeration (Nmap), web footprinting, file transfers, shells/payloads, Metasploit, password attacks, pivoting/tunnelling, Active Directory enumeration and attacks, web app attacks (SQLi, SQLMap, XSS, LFI, file upload, command injection, Ffuf), and Linux/Windows privilege escalation. It functions as a reference guide mirroring the official HTB Academy course structure rather than original research.
github.comrepoPublished and added 18 Jul 2026π‘οΈ Security - gioblu/NPC-Forge
NPC-Forge is a framework for building deterministic, non-ML conversational NPCs/agents with multi-turn context, sentiment analysis, and tool-call support, designed to run on CPU even on embedded or obsolete hardware. It ships with an OpenAI-compatible API server so its deterministic agents can be plugged into LLM harnesses like Open WebUI or GitHub Copilot, and includes TERMy, a bundled NPC that transpiles natural-language prompts or scripts into shell commands without using any model. Agents are defined and updated via a dataset format (NDF) rather than trained, with a CLI (npc-forge list/serve/install/reboot) for managing and running them; currently an experimental Linux/WSL-only release under AGPL-3.0.
github.comrepoAdded 30 Sep 2026, published 18 Jul 2026π§ AI - Trusted-AI/adversarial-robustness-toolbox
Adversarial Robustness Toolbox (ART) is a Python library, hosted by the Linux Foundation AI & Data Foundation, for evaluating and defending machine learning models against adversarial threats: evasion, poisoning, extraction, and inference attacks. It supports major ML frameworks (TensorFlow, Keras, PyTorch, scikit-learn, XGBoost, LightGBM, CatBoost) across data types (images, tables, audio, video) and tasks (classification, object detection, speech recognition, certification), and was developed with DARPA support.
github.comrepoPublished and added 14 Jul 2026π‘οΈ Security - ZX41R/awesome-reverse-engineering-and-malware-analysis
A curated, upkept "awesome list" for reverse engineering and malware analysis that organizes hundreds of resources into guided learning tracks (Windows malware triage-to-config-extraction, Linux/ELF reversing, exploit development, firmware & embedded, mobile, anti-analysis) plus a full taxonomy covering foundations, RE tooling (IDA, Ghidra, Binary Ninja, radare2, x64dbg), malware analysis/unpacking/YARA/C2 tracking, fuzzing (AFL++, libFuzzer), firmware, mobile, OS internals, LOLBAS/GTFOBins living-off-the-land resources, DFIR, and threat intelligence. It also surfaces niche researcher communities like Kanxue, 52pojie, Tuts4You, the WASM Russian RE forum, 0x00sec, and back.engineering (VTIL/VMProtect devirtualization work), with every link manually vetted and dead links pruned.
github.comrepoAdded 30 Sep 2026, published 6 Jul 2026π‘οΈ Security - RAPTOR
RAPTOR is an autonomous offensive/defensive security research framework built on top of Claude Code that chains static analysis (Semgrep, Coccinelle, CodeQL), binary analysis (radare2, Frida, Z3-based exploit feasibility), LLM-driven multi-stage vulnerability validation, exploit PoC generation, and patch writing into a single workflow against source code or compiled binaries. It also includes an /sca supply-chain command that enriches dependency findings with OSV, CISA KEV, EPSS, and SSVC data and emits CycloneDX SBOMs, and sandboxes LLM-generated/untrusted code execution using Linux namespaces, Landlock, and seccomp. Authored by Gadi Evron, Daniel Cuthbert, Thomas Dullien (Halvar Flake), Michael Bargury, and John Cartwright, it ships 200+ custom static analysis rules and supports multi-model LLM analysis (Claude, GPT, Gemini, Ollama).
github.comrepoPublished and added 28 Jun 2026π‘οΈ Security - Bumblebee
Bumblebee is a single-binary, read-only inventory scanner for macOS/Linux developer endpoints that parses lockfiles, package-manager metadata, extension manifests, and MCP JSON configs into structured NDJSON component records. Given an exposure catalog (exact ecosystem/name/version matches), it emits finding records so responders can quickly answer "which machines have this compromised package right now" during a supply-chain incident, without executing package managers or reading source files. It ships baseline/project/deep scan profiles, a built-in selftest against embedded fixtures, and maintained threat-intel exposure catalogs built from public supply-chain campaign reporting.
github.comrepoPublished and added 24 May 2026π‘οΈ Security - IDP Zero-Dollar
A companion GitOps playbook/repo for building a free, self-hosted "AWS-equivalent" Kubernetes platform from three bare-metal Linux boxes using k3s, Cilium, cert-manager, Traefik, Argo CD, Forgejo, Vault, Keycloak, kube-prometheus-stack, Loki, Kyverno, and Velero. It walks through the full security-relevant stack end to end: OS hardening (SSH lockdown, ufw, fail2ban), Cilium NetworkPolicy as CNI, Let's Encrypt DNS01 wildcard certs, Vault as the source of truth for secrets synced via External Secrets Operator (never committing secrets to Git), Keycloak OIDC for centralized identity across Argo/Grafana/Forgejo/Vault, Kyverno pod-security policies in audit-then-enforce mode, and Velero + Vault Raft snapshot backup/DR with quarterly restore drills. It closes with a candid list of what self-hosting gives up versus managed cloud (CVE patch cadence, DDoS exposure, compliance evidence, etcd/HA operational risk).
github.comrepoAdded 3 Sep 2026, published 13 May 2026π‘οΈ Security - Hack Skills
hack-skills is a GitHub repo (yaklang/hack-skills) that packages offensive security knowledge into installable "Agent Skills" β one master entry, six category entries, and 102 deep-topic SKILL.md files across 14 domains including web/API security, auth, Linux/Windows/macOS privilege escalation, Active Directory attacks, mobile, binary exploitation, reverse engineering, crypto attacks, blockchain/smart contracts, AI/LLM security, network pivoting, and forensics. It's designed for AI coding agents (installed via `npx skills add yaklang/hack-skills` or a raw SKILL.md URL) to use during authorized pentesting, bug bounty, and CTF work, and explicitly strips destructive PoCs (DROP/TRUNCATE, FLUSHALL, service shutdown/DoS) in favor of non-destructive proofs like time-based SQLi and read-only recon, while retaining RCE/webshell/reverse-shell primitives as access proofs.
github.comrepoAdded 3 Sep 2026, published 13 May 2026π‘οΈ Security - 0xor0ne Awesome List
0xor0ne's Awesome List is a hand-curated GitHub collection of hundreds of deep-dive security write-ups, CVE analyses, and papers spanning binary exploitation, Linux kernel exploitation (io_uring, netfilter, nf_tables, DirtyPipe, DirtyCred), heap/GLIBC exploitation techniques, secure boot and firmware bypasses on embedded/IoT devices (ESP32, routers, IP cameras, NAS), and hardware/RF hacking (glitching, side channels, BLE/NFC). It complements the author's separate Cybersecurity Tools list and organizes entries loosely by domain (Exploitation, Linux Kernel, Wireless, OT/IoT, Red Teaming).
github.comrepoAdded 3 Sep 2026, published 12 May 2026π‘οΈ Security - Linux Attack Detection & Forensics
A GitHub repository collecting publicly available preview lab sections and demos from "Linux Attack, Detection, and Forensics V2.0," Leszek MiΕ's hands-on Purple Teaming training delivered at Black Hat USA, X33FCON, and OrangeCon. The materials cover Linux offensive tradecraft paired with detection/forensics logic mapped to MITRE ATT&CK, teaching attacker and defender perspectives through 100% hands-on Linux scenarios.
github.comrepoAdded 3 Sep 2026, published 12 May 2026π‘οΈ Security
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