RHSA-2026:84842HighCVSS 7.8

Red Hat Security Advisory: flatpak-builder security update

Published
October 19, 2026
Last Modified
October 21, 2026

🔗 CVE IDs covered (1)

CVE-2026-86320 →

📋 Description

CVE-2026-86320 — flatpak-builder: Host code execution via git am hook execution in patch source extraction (use-git-am)

🎯 Affected products14

  • Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • flatpak-builder-0:1.2.2-2.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • flatpak-builder-0:1.2.2-2.el9_2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • flatpak-builder-0:1.2.2-2.el9_2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • flatpak-builder-0:1.2.2-2.el9_2.src as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • flatpak-builder-0:1.2.2-2.el9_2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • flatpak-builder-debuginfo-0:1.2.2-2.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • flatpak-builder-debuginfo-0:1.2.2-2.el9_2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • flatpak-builder-debuginfo-0:1.2.2-2.el9_2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • flatpak-builder-debuginfo-0:1.2.2-2.el9_2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • flatpak-builder-debugsource-0:1.2.2-2.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • flatpak-builder-debugsource-0:1.2.2-2.el9_2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • flatpak-builder-debugsource-0:1.2.2-2.el9_2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • flatpak-builder-debugsource-0:1.2.2-2.el9_2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 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.

🔗 References (4)