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Affected Component
Analysis
yelp
Exploitable
Name
CVE-2026-13601
Description
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, attacker-controlled content can bypass Flatpak's intended sandbox isolation, allowing Yelp to evaluate local XML inclusions and disclose arbitrary user-readable host files through remote CSS resource requests. This may result in the unauthorized disclosure of sensitive information.
Published Date
Updated Date
Workaround
-
Advisories
https://access.redhat.com/security/cve/CVE-2026-13601Vendor Advisory
https://blogs.gnome.org/mcatanzaro/2026/05/11/flatpak-sandbox-escape-via-yelp/Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2494110Issue Tracking
https://gitlab.gnome.org/GNOME/yelp/-/work_items/238Issue Tracking
https://access.redhat.com/security/cve/CVE-2026-13601Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2494110Issue Tracking
Analysis#
Vulnerability Ratings#
7.1
CVSSv31
6.5
CVSSv31
7.1
CVSSv31
NaN
other