CVE-2026-86320
HIGH
NVD
CVSS Score
7.8
Severity
HIGH
Published
Sep 17, 2026
Vendor
unknown
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.