CVE-2026-86320 - Flatpak-builder: host code execution via `git am` hook execution in patch source extraction (`use-git-am`)

CVE-2026-86320 - Flatpak-builder: host code execution via `git am` hook execution in patch source extraction (`use-git-am`)

https://cvefeed.io/rssfeed/latest.atom / Thu, 09/17/2026 - 13:32
CVE ID :CVE-2026-86320
Published : Sept. 17, 2026, 8:17 a.m. | 2 hours, 51 minutes ago
Description :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.
Severity: 7.8 | HIGH
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Kenya Education Network CERT(KENET-CERT) is a Cybersecurity Emergency Response Team and Co-ordination Center operated by the National Research and Education Network of Kenya. KENET-CERT coordination center promotes awareness on cybersecurity incidences as well as coordinates and assists member institutions in responding effectively to cyber security threats and incidences. KENET-CERT works closely with Kenya's National CIRT coordination center (CIRT/CC) as a sector CIRT for the academic institutions. KENET promotes use of ICT in Teaching, Learning and Research in Higher Education Institutions in Kenya. KENET aims to interconnect all the Universities, Tertiary and Research Institutions in Kenya by setting up a cost effective and sustainable private network with high speed access to the global Internet. KENET also facilitates electronic communication among students and faculties in member institutions, share learning and teaching resources by collaboration in Research and Development of Educational content.