Detections
Analytics
CVE-2026-97026
critical
Description
Flatpak creates temporary child repository directories under the user cache with world-writable permissions (0777). On multi-user systems with a permissive umask, other local users could read or modify the temporary directory used while installing apps or runtimes, potentially causing installation failures (denial of service); tampered content would fail signature/digest verification rather than being trusted.
References
https://github.com/flatpak/flatpak/security/advisories/GHSA-r9w3-qx54-qvc8