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.

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Vendors Products
Enterprise Linux Subscribe
Enterprise Linux Eus Subscribe
Rhel Aus Subscribe
Rhel E4s Subscribe
Rhel Eus Subscribe
Rhel Eus Long Life Subscribe
Rhel Tus Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

Avoid using use-git-am: true when processing untrusted manifests or source material. Where untrusted builds are required, perform builds inside disposable virtual machines or other isolated environments.

History

Fri, 30 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:rhel_aus:8.4::appstream
cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
References

Wed, 28 Oct 2026 19:00:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel Aus
Redhat rhel Eus Long Life
CPEs cpe:/a:redhat:rhel_aus:8.6::appstream
cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
Vendors & Products Redhat rhel Aus
Redhat rhel Eus Long Life
References

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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-10-30T00:03:16.184Z

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: 2026-10-30T01:16:47.843

Link: CVE-2026-86320

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-18T02:00:16Z

Weaknesses