CVE-2026-86320Flatpak-builder: host code execution via `git am` hook execution in patch source extraction (`use-git-am`)
Updated under an hour ago ()
Does this affect you?
It affects Red Hat Enterprise Linux 10. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-94
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 12, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:1.4.4-1.el10_2.1 not affected | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:80495vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:80496vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:80973vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-86320vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2471023issue-tracking, x-refsource-redhat
- https://github.com/flatpak/flatpak-builder/security/advisories/GHSA-j5p8-jgjc-f3xv
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.