CVE-2026-86320
highA flaw was found in flatpak-builder where Git hooks are not disabled when applying patch sources with use-git-am: true.
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
7.8 (CVSS v3.1)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (secalert@redhat.com)
Timeline (UTC)
Published: 2026-09-17 08:17
Modified: 2026-10-30 01:16
NVD status: Awaiting Analysis
Last synced 1 hour ago
Verified against the source API 2026-10-30 01:37 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://access.redhat.com/errata/RHSA-2026:80495 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:80496 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:80973 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:84832 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:84833 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:84834 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:84842 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:86714 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:90896 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:92220 secalert@redhat.com
- https://access.redhat.com/security/cve/CVE-2026-86320 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2471023 secalert@redhat.com
- https://github.com/flatpak/flatpak-builder/security/advisories/GHSA-j5p8-jgjc-f3xv secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2471023 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://github.com/flatpak/flatpak-builder/security/advisories/GHSA-j5p8-jgjc-f3xv 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
NVD CVE API 2.0 — fetched 2026-10-30 01:37 UTC · record ↗