Detections
Analytics
CVE-2026-96281
medium
Description
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.
References
https://github.com/flatpak/flatpak/security/advisories/GHSA-q4gr-vc25-57m5
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-88027