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High 7.1Published Jun 29, 2026

CVE-2026-13601Yelp: yelp-xsl: overly permissive content security policy in yelp allows host file disclosure from flatpak applications

Updated under an hour ago ()

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It affects Red Hat Enterprise Linux 7 Extended Lifecycle Support and 7 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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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
7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness (CWE)
CWE-693
Known exploited
Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days)
Not loaded for this CVE
Assigned by
redhat
NVD analysis
Modified
Record last updated
Aug 20, 2026
First seen by InfoSec Signals
Oct 9, 2026

Affected products

Affected products
from 2:3.28.1-2.el7_9 not affected
CNA record
Red Hat Red Hat Enterprise Linux 8
redhat:enterprise_linux
from 2:3.28.1-3.el8_10.2 not affected
CNA record
from 2:3.28.1-3.el8_4.2 not affected
CNA record
from 2:3.28.1-3.el8_4.2 not affected
CNA record
from 2:3.28.1-3.el8_8.2 not affected
CNA record
from 2:3.28.1-3.el8_8.2 not affected
CNA record
from 2:40.3-2.el9_6.2 not affected
CNA record
Red Hat Red Hat Enterprise Linux 8
redhat:enterprise_linux
from 2:3.28.1-3.el8_10.2 not affected
CISA ADP
from 2:3.28.1-3.el8_4.2 not affected
CISA ADP
from 2:3.28.1-3.el8_4.2 not affected
CISA ADP

References

References

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.

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