CVE-2026-86320 — Flatpak-builder: host code execution via `git am` hook execution in patch source extraction (`use-git-am`)
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…
Published: 2026-09-17 · CVSS: 7.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7