CVE-2026-13601
Yelp: yelp-xsl: overly permissive content security policy in yelp allows host file disclosure from flatpak applications
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.
INFO
Published Date :
June 29, 2026, 9:20 a.m.
Last Modified :
June 29, 2026, 10:03 a.m.
Remotely Exploit :
No
Source :
redhat
Affected Products
The following products are affected by CVE-2026-13601
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 53f830b8-0a3f-465b-8143-3b8a9948e749 |
Solution
- Restrict XML parsing to trusted sources.
- Limit external CSS resource loading.
- Review and tighten Content Security Policy.
- Update yelp-xsl to a secure version.
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CVE-2026-13601 vulnerability anywhere in the article.