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.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-9b73fdb8e6 advisory.

    Update to 1.4.12

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 45 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-c450ece4a4 advisory.

    Update to 1.4.12


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-86320)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-86320)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
351288	Fedora 44 : flatpak-builder (2026-9b73fdb8e6)	Nessus	Fedora Local Security Checks	Local	high
349932	Fedora 45 : flatpak-builder (2026-c450ece4a4)	Nessus	Fedora Local Security Checks	Local	high
447993	Alpine: multiple flatpak-builder packages: security update to 1.4.11-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	high
447993	Alpine: multiple flatpak-builder packages: security update to 1.4.11-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	high
345679	Linux Distros Unpatched Vulnerability : CVE-2026-86320	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-86320

high

Tenable Plugins

high

high

high

high

high