EUVD-2026-40066

A flaw was found in Yelp due to an overly permissive Content Security Policy CSP implementation provided by yelp-xsl. A malicious Flatpak application can open crafted help content through the OpenURI portal. By embedding an untrusted CSS stylesheet within a structured SVG document,...

Medium: yelp

Issue Overview: A sandbox escape vulnerability was found in yelp, the GNOME help viewer. Bypassing the fix for CVE-2025-3155, a malicious help document can use a CSS stylesheet embedded in an SVG image to exfiltrate the contents of local files such as files under /proc to an external server witho...