
JFrog Security (@JFrogSecurity) on X
JFrog Security announces research on CVE-2026-102479 in Vert.x, which skips validating the letter 'L' in header names and so accepts `Content-Xength` as `Content-Length`. JFrog Research chained this with a dangling-byte primitive to bypass reverse proxy socket validation. They demonstrate end-to-end response poisoning and session fixation behind real reverse proxies. The post links to a full writeup; the tweet itself gives no exploit detail.
AppSec, Offensive Security· Added 30 Oct 2026, published 28 Oct 2026




















