Vulnerability Description
A flaw was found in flatpak-builder where Git hooks are not disabled when applying patch sources with use-git-am: true. An attacker who can provide a malicious source containing a Git post-applypatch hook can cause the hook to execute on the host during the build process, resulting in arbitrary code execution with the privileges of the user running flatpak-builder.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://access.redhat.com/security/cve/CVE-2026-86320
- https://bugzilla.redhat.com/show_bug.cgi?id=2471023
- https://github.com/flatpak/flatpak-builder/security/advisories/GHSA-j5p8-jgjc-f3
- https://bugzilla.redhat.com/show_bug.cgi?id=2471023
- https://github.com/flatpak/flatpak-builder/security/advisories/GHSA-j5p8-jgjc-f3
FAQ
What is CVE-2026-86320?
CVE-2026-86320 is a vulnerability with a CVSS score of 7.8 (HIGH). A flaw was found in flatpak-builder where Git hooks are not disabled when applying patch sources with use-git-am: true. An attacker who can provide a malicious source containing a Git post-applypatch ...
How severe is CVE-2026-86320?
CVE-2026-86320 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-86320?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.