Protection Mechanism Failure Affecting yelp-devel package, versions <2:40.3-3.el9_8.1


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.18% (8th percentile)

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  • Snyk IDSNYK-RHEL9-YELPDEVEL-18534372
  • published5 Aug 2026
  • disclosed7 May 2026

Introduced: 7 May 2026

CVE-2026-13601  (opens in a new tab)
CWE-693  (opens in a new tab)

How to fix?

Upgrade RHEL:9 yelp-devel to version 2:40.3-3.el9_8.1 or higher.
This issue was patched in RHSA-2026:47178.

NVD Description

Note: Versions mentioned in the description apply only to the upstream yelp-devel package and not the yelp-devel package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1