CVE-2026-97026 — Flatpak: flatpak: world-writable temporary child repositories in system-helper cache path
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 us…
Published: 2026-09-28 · CVSS: 3.9 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7