CVE-2026-86320
Fixed in a distro release EPSS <1%CVSS 7.8
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.
Products: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.6 Extended Update Support
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | flatpak-builder | 1.4.4-1.el10_2.1 |
| AlmaLinux 8 | flatpak-builder | 1.2.3-2.el8_10 |
| AlmaLinux 9 | flatpak-builder | 1.2.3-1.el9_8.1 |
| Amazon Linux 2023 | flatpak-builder | 1.4.4-1.amzn2023.0.2 |
| Amazon Linux 2023 | flatpak-builder-tests | 1.4.4-1.amzn2023.0.2 |
| Debian 12 | flatpak-builder | no fix |
| Debian 13 | flatpak-builder | no fix |
| Debian 14 | flatpak-builder | 1.4.11-1 |
| Red Hat Enterprise Linux 10.2 | flatpak-builder | 0:1.4.4-1.el10_2.1 |
| Red Hat Enterprise Linux 10.2 | flatpak-builder-debuginfo | 0:1.4.4-1.el10_2.1 |
| Red Hat Enterprise Linux 10.2 | flatpak-builder-debugsource | 0:1.4.4-1.el10_2.1 |
| Red Hat Enterprise Linux 8 | flatpak-builder | 0:1.2.3-2.el8_10 |
| Red Hat Enterprise Linux 8 | flatpak-builder-debuginfo | 0:1.2.3-2.el8_10 |
| Red Hat Enterprise Linux 8 | flatpak-builder-debugsource | 0:1.2.3-2.el8_10 |
| Red Hat Enterprise Linux 9 | flatpak-builder | 0:1.2.3-1.el9_8.1 |
| Red Hat Enterprise Linux 9 | flatpak-builder-debuginfo | 0:1.2.3-1.el9_8.1 |
| Red Hat Enterprise Linux 9 | flatpak-builder-debugsource | 0:1.2.3-1.el9_8.1 |
| Red Hat Enterprise Linux eus 10.0 | flatpak-builder | 0:1.4.4-1.el10_0.1 |
| Red Hat Enterprise Linux eus 10.0 | flatpak-builder-debuginfo | 0:1.4.4-1.el10_0.1 |
| Red Hat Enterprise Linux eus 10.0 | flatpak-builder-debugsource | 0:1.4.4-1.el10_0.1 |
| Red Hat rhel e4s 9.2 | flatpak-builder | 0:1.2.2-2.el9_2 |
| Red Hat rhel e4s 9.2 | flatpak-builder-debuginfo | 0:1.2.2-2.el9_2 |
| Red Hat rhel e4s 9.2 | flatpak-builder-debugsource | 0:1.2.2-2.el9_2 |
| Red Hat rhel e4s 9.4 | flatpak-builder | 0:1.2.3-2.el9_4 |
| Red Hat rhel e4s 9.4 | flatpak-builder-debuginfo | 0:1.2.3-2.el9_4 |
| Red Hat rhel e4s 9.4 | flatpak-builder-debugsource | 0:1.2.3-2.el9_4 |
| Red Hat rhel eus 9.6 | flatpak-builder | 0:1.2.3-1.el9_6.1 |
| Red Hat rhel eus 9.6 | flatpak-builder-debuginfo | 0:1.2.3-1.el9_6.1 |
| Red Hat rhel eus 9.6 | flatpak-builder-debugsource | 0:1.2.3-1.el9_6.1 |
| Rocky Linux 10 | flatpak-builder | 0:1.4.4-1.el10_2.1 |
| Rocky Linux 8 | flatpak-builder | 0:1.2.3-2.el8_10 |
| Rocky Linux 9 | flatpak-builder | 0:1.2.3-1.el9_8.1 |
| Ubuntu 18.04 LTS | flatpak-builder | no fix |
| Ubuntu 20.04 LTS | flatpak-builder | no fix |
| Ubuntu 22.04 LTS | flatpak-builder | no fix |
| Ubuntu 24.04 LTS | flatpak-builder | no fix |
| Ubuntu 26.04 LTS | flatpak-builder | no fix |
| Ubuntu 26.10 | flatpak-builder | no fix |
| openSUSE Tumbleweed | flatpak-builder | 1.4.12-1.1 |