{"id":"DEBIAN-CVE-2026-86320","details":"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.","modified":"2026-09-19T22:47:40.072707541Z","published":"2026-09-17T08:17:02.200Z","upstream":["CVE-2026-86320"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-86320"}],"affected":[{"package":{"name":"flatpak-builder","ecosystem":"Debian:12","purl":"pkg:deb/debian/flatpak-builder?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.3-1","1.3.1-1","1.3.3-1","1.3.4-1","1.3.5-1","1.4.0-1","1.4.1-1","1.4.10-1","1.4.11-1","1.4.12-1","1.4.12-2","1.4.2-1","1.4.4-1","1.4.4-1~bpo12+1","1.4.4-2","1.4.5-1","1.4.6-1","1.4.6-2","1.4.7-1","1.4.8-1","1.4.9-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-86320.json"}},{"package":{"name":"flatpak-builder","ecosystem":"Debian:13","purl":"pkg:deb/debian/flatpak-builder?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.10-1","1.4.11-1","1.4.12-1","1.4.12-2","1.4.4-2","1.4.5-1","1.4.6-1","1.4.6-2","1.4.7-1","1.4.8-1","1.4.9-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-86320.json"}},{"package":{"name":"flatpak-builder","ecosystem":"Debian:14","purl":"pkg:deb/debian/flatpak-builder?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.11-1"}]}],"versions":["1.4.10-1","1.4.4-2","1.4.5-1","1.4.6-1","1.4.6-2","1.4.7-1","1.4.8-1","1.4.9-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-86320.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}