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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

Description (CNA)

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 (CNA)

Vendor / productVersions
Red Hat / Red Hat Enterprise Linux 7 Extended Lifecycle Supportunaffected 2:3.28.1-2.el7_9 before *
Red Hat / Red Hat Enterprise Linux 8unaffected 2:3.28.1-3.el8_10.2 before *
Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportunaffected 2:3.28.1-3.el8_4.2 before *
Red Hat / Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onunaffected 2:3.28.1-3.el8_4.2 before *
Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportunaffected 2:3.28.1-3.el8_6.2 before *
Red Hat / Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Onunaffected 2:3.28.1-3.el8_6.2 before *
Red Hat / Red Hat Enterprise Linux 8.8 Telecommunications Update Serviceunaffected 2:3.28.1-3.el8_8.2 before *
Red Hat / Red Hat Enterprise Linux 8.8 Update Services for SAP Solutionsunaffected 2:3.28.1-3.el8_8.2 before *
Red Hat / Red Hat Enterprise Linux 9unaffected 2:40.3-3.el9_8.1 before *
Red Hat / Red Hat Enterprise Linux 9.2 Update Services for SAP Solutionsunaffected 2:40.3-2.el9_2.2 before *
Red Hat / Red Hat Enterprise Linux 9.4 Update Services for SAP Solutionsunaffected 2:40.3-2.el9_4.2 before *
Red Hat / Red Hat Enterprise Linux 9.6 Extended Update Supportunaffected 2:40.3-2.el9_6.2 before *
Red Hat / Red Hat Enterprise Linux 6unknown

CWE

CWE-693

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

redhat-SADP

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.