CVE-2026-13601
HIGH severity · CVSS 7.1 · CWE-693
7.1CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactNone
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://access.redhat.com/errata/RHSA-2026:47177
- https://access.redhat.com/errata/RHSA-2026:47178
- https://access.redhat.com/errata/RHSA-2026:54539
- https://access.redhat.com/errata/RHSA-2026:54540
- https://access.redhat.com/errata/RHSA-2026:54605
- https://access.redhat.com/errata/RHSA-2026:54624
- https://access.redhat.com/errata/RHSA-2026:54637
- https://access.redhat.com/errata/RHSA-2026:54666