6.5

CVE-2026-13601

Yelp: yelp-xsl: overly permissive content security policy in yelp allows host file disclosure from flatpak applications

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Redhat ≫ Enterprise Linux Version 6.0
Redhat ≫ Enterprise Linux Version 7.0
Redhat ≫ Enterprise Linux Version 8.0
Redhat ≫ Enterprise Linux Version 9.0
Gnome ≫ Yelp Version < 49.1
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.13% 0.032
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 6.5 2 4
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
RedHat 7.1 2.5 4
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 7.1 2.5 4
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CWE-693 Protection Mechanism Failure

The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

https://blogs.gnome.org/mcatanzaro/2026/05/11/flatpak-sandbox-escape-via-yelp/
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2494110
Vendor Advisory
Issue Tracking
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-13601.json
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-13601
Vendor Advisory
https://gitlab.gnome.org/GNOME/yelp/-/commit/c8c8244c8a812860782d635890c9b6c43ecc2639
Patch
https://gitlab.gnome.org/GNOME/yelp/-/work_items/238
Third Party Advisory
Issue Tracking
Mitigation
https://access.redhat.com/errata/RHSA-2026:47177
https://access.redhat.com/errata/RHSA-2026:47178
https://access.redhat.com/errata/RHSA-2026:54540
https://access.redhat.com/errata/RHSA-2026:54539
https://access.redhat.com/errata/RHSA-2026:54624
https://access.redhat.com/errata/RHSA-2026:54637
https://access.redhat.com/errata/RHSA-2026:54605
https://access.redhat.com/errata/RHSA-2026:54666
https://access.redhat.com/errata/RHSA-2026:57417