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CVE-2026-13601

medium

A flaw was found in Yelp due to an overly permissive Content Security Policy (CSP) implementation provided by yelp-xsl.

Vendor / product: Redhat — enterprise linux

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
6.5
6.5 (CVSS v3.1)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-06-29 10:16
Modified: 2026-11-04 22:17
NVD status: Modified
Last synced 2 hours ago
Verified against the source API 2026-11-04 22:37 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

redhat / enterprise_linux 6.0, 7.0, 8.0, 9.0
gnome / yelp <49.1

Weakness classification (CWE)

CWE-693

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://access.redhat.com/security/cve/CVE-2026-13601
Vendor advisory: https://bugzilla.redhat.com/show_bug.cgi?id=2494110
Vendor advisory: https://access.redhat.com/security/cve/CVE-2026-13601
Vendor advisory: https://bugzilla.redhat.com/show_bug.cgi?id=2494110
Vendor advisory: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-13601.json
Patch / mitigation: https://gitlab.gnome.org/GNOME/yelp/-/commit/c8c8244c8a812860782d635890c9b6c43ecc2639
Patch / mitigation: https://gitlab.gnome.org/GNOME/yelp/-/work_items/238

References

Data sources

NVD CVE API 2.0 — fetched 2026-11-04 22:37 UTC · record ↗

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Understanding CVEs and CVSS Scores

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