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CVE-2026-13601

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

Published: Jun 29, 2026Updated: Jul 15, 2026 Sources: CVE List NVDCWE-693
7.1HIGH
NVD MITRE
EPSS Score
0.1%
Top 97.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:NS:CC:HI:NA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-693

Affected Products

Red Hat
commercial·USaka redhat
Red Hat Enterprise Linux 6On-premOS
Operating Systems / linux-distro
gnome
oss-project·USaka gnome project, glib
yelpOn-premDesktop App
Consumer Software / productivity
and 4 more affected products View all →

Exploitability

Official Patch Available
Workaround Available
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References

https://access.redhat.com/security/cve/CVE-2026-13601
access.redhat.com
https://blogs.gnome.org/mcatanzaro/2026/05/11/flatpak-sandbox-escape-via-yelp/
blogs.gnome.org
https://bugzilla.redhat.com/show_bug.cgi?id=2494110
bugzilla.redhat.com
and 3 more references View all →

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