flatpak: On a multi-user system, a user with an active local login session could downgrade a system-wide Flatpak app to an old...
CVE-2026-96281 is fixed in flatpak on 1 platform, first by DEBIAN-CVE-2026-96281, released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.
On a multi-user system, a user with an active local login session could downgrade a system-wide Flatpak app to an older version by removing the app's remote ref via the unprivileged system-helper RemoveLocalRef method, causing the anti-downgrade check to fail to find a reference date. A malicious local user could use this to expose other users of the same system to an app version with unfixed vulnerabilities.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| flatpak · Debian 13.5 (trixie) | 1.16.6-1~deb13u2 | DEBIAN-CVE-2026-96281 | Sep 23, 2026 |
| flatpak · Debian 14 | 1.18.1-1 | DEBIAN-CVE-2026-96281 | Sep 23, 2026 |
| flatpak · sles 15.6 | 1.16.6-150600.3.12.1 | SUSE-SU-2026:4944-1 | Nov 7, 2026 |
| flatpak · sles 15.7 | 1.16.6-150600.3.12.1 | SUSE-SU-2026:4944-1 | Nov 7, 2026 |
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