CVE-2026-86320Flatpak-builder: host code execution via `git am` hook execution in patch source extraction (`use-git-am`)
Updated under an hour ago ()
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It affects Red Hat Enterprise Linux 10 and 4 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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 21, 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 |
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus | from 0:1.4.4-1.el10_0.1 not affected | CNA record |
from 0:1.0.14-3.el8_8 not affected | CNA record | |
from 0:1.0.14-3.el8_8 not affected | CNA record | |
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus | from 0:1.2.3-1.el9_6.1 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/errata/RHSA-2026:84832vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:84833vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:84834vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:84842vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:86714vendor-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.