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.
History

Wed, 21 Oct 2026 11:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel Tus
CPEs cpe:/a:redhat:rhel_e4s:8.8::appstream
cpe:/a:redhat:rhel_tus:8.8::appstream
Vendors & Products Redhat rhel Tus
References

Mon, 19 Oct 2026 12:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel E4s
Redhat rhel Eus
CPEs cpe:/a:redhat:rhel_e4s:9.2::appstream
cpe:/a:redhat:rhel_e4s:9.4::appstream
cpe:/a:redhat:rhel_eus:9.6::appstream
Vendors & Products Redhat rhel E4s
Redhat rhel Eus
References

Mon, 19 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat enterprise Linux Eus
CPEs cpe:/o:redhat:enterprise_linux_eus:10.0
Vendors & Products Redhat enterprise Linux Eus
References

Mon, 12 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:8 cpe:/a:redhat:enterprise_linux:8::appstream
References

Mon, 12 Oct 2026 03:00:00 +0000

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:9
cpe:/a:redhat:enterprise_linux:9::appstream
cpe:/o:redhat:enterprise_linux:10.2
References

Thu, 17 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 17 Sep 2026 08:45:00 +0000

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9

Thu, 17 Sep 2026 07:30:00 +0000

Type Values Removed Values Added
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.
Title Flatpak-builder: host code execution via `git am` hook execution in patch source extraction (`use-git-am`)
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-94
CPEs cpe:/o:redhat:enterprise_linux:10
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2026-09-17T07:27:33.167Z

Updated: 2026-10-21T11:21:31.111Z

Reserved: 2026-09-07T05:35:25.012Z

Link: CVE-2026-86320

cve-icon Vulnrichment

Updated: 2026-09-17T15:42:29.021Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-17T08:17:02.200

Modified: 2026-10-21T12:17:24.413

Link: CVE-2026-86320

cve-icon Redhat

No data.