CVE-2026-86320

HIGH CVSS 3.1: 7.8 EPSS 0.22%
Updated Sep 18, 2026
Red Hat
Parameter Value
CVSS 7.8 (HIGH)
Type CWE-94 (Code Injection)
Vendor Red Hat
Public PoC No

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.

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)

Vulnerable Products

red hat:red hat enterprise linux 10