Riskcovery

CVE-2026-13601

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

State
Published
Severity
7.1 High
Published
Jun 29, 2026
Updated
Aug 20, 2026
Reserved
Jun 29, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.1 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:Nredhat
3.17.1 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:Nredhat-SADP

Weaknesses

  • CWE-693 Protection Mechanism Failure

Affected Products

ProductVersions
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRed Hat
  • 2:3.28.1-2.el7_9 and laterNot affected
Red Hat Enterprise Linux 8Red Hat
  • 2:3.28.1-3.el8_10.2 and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat
  • 2:3.28.1-3.el8_4.2 and laterNot affected
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRed Hat
  • 2:3.28.1-3.el8_4.2 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat
  • 2:3.28.1-3.el8_6.2 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRed Hat
  • 2:3.28.1-3.el8_6.2 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat
  • 2:3.28.1-3.el8_8.2 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat
  • 2:3.28.1-3.el8_8.2 and laterNot affected
Red Hat Enterprise Linux 9Red Hat
  • 2:40.3-3.el9_8.1 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat
  • 2:40.3-2.el9_2.2 and laterNot affected
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRed Hat
  • 2:40.3-2.el9_4.2 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat
  • 2:40.3-2.el9_6.2 and laterNot affected
Red Hat Enterprise Linux 6Red Hat

    References

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