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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade flatpak-builder | Oct 13, 2026 | Oct 12, 2026 |
| Alpine Linux | — | Upgrade flatpak-builder | Sep 18, 2026 | Sep 17, 2026 |
| Amazon_linux_2023 | — | Upgrade flatpak-builder-testsUpgrade flatpak-builderUpgrade flatpak-builder-debugsourceUpgrade flatpak-builder-debuginfo | Oct 13, 2026 | Sep 17, 2026 |
| Redhat_linux | — | Upgrade flatpak-builder-debugsourceUpgrade flatpak-builderUpgrade flatpak-builder-debuginfo | Sep 18, 2026 | Aug 13, 2026 |
| Rocky_linux | — | Upgrade flatpak-builder-debuginfoUpgrade flatpak-builderUpgrade flatpak-builder-debugsource | Oct 15, 2026 | Oct 13, 2026 |
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