CVE-2026-13601

Medium

Elevated severity or exploit probability.

CVSS base

7.1 HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

EPSS — probability of exploitation (30 days)

0.2%

7.8th percentile

CISA KEV

Not listed

Weakness / dates

CWE-693

Published 2026-06-29 · modified 2026-08-20

CVSS breakdown

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack Vector	L	Local
Attack Complexity	L	Low
Privileges Required	N	None
User Interaction	N	None
Scope	C	Changed
Confidentiality	H	High
Integrity	N	None
Availability	N	None

Timeline

2026-06-29 — Published (NVD)
2026-08-20 — Last modified (NVD)

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.

Affected

gnome redhat

References

Official: NVD · CVE.org