CVE-2026-86320
Flatpak-builder: host code execution via `git am` hook execution in patch source extraction (`use-git-am`)
CVSS Score
7.8
EPSS Score
0.3%
EPSS Percentile
21th
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.
| CWE | CWE-94 |
| Vendor | red hat |
| Product | red hat enterprise linux 10 |
| Published | Sep 17, 2026 |
| Last Updated | Oct 30, 2026 |
Stay Ahead of the Next One
Get instant alerts for red hat red hat enterprise linux 10
Be the first to know when new high vulnerabilities affecting red hat red hat enterprise linux 10 are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 10.0 Extended Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
All versions affected Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
All versions affected Red Hat / Red Hat Enterprise Linux 8.8 Telecommunications Update Service
All versions affected Red Hat / Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
All versions affected Red Hat / Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
All versions affected Red Hat / Red Hat Enterprise Linux 9.6 Extended Update Support
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2026:80495 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:80496 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:80973 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:84832 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:84833 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:84834 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:84842 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:86714 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:90896 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:92220 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-86320 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2471023 github.com: https://github.com/flatpak/flatpak-builder/security/advisories/GHSA-j5p8-jgjc-f3xv
Credits
Red Hat would like to thank AISLE Research for reporting this issue.