CVE-2026-96281
6.2
CVSS:3.1/AV:P/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|
Weaknesses
- CWE-284: Improper Access Control
Workarounds
Ensure that Flatpak apps installed system-wide are fully updated before running them.
References
- https://access.redhat.com/security/cve/CVE-2026-96281
- https://bugzilla.redhat.com/show_bug.cgi?id=2539421
- https://github.com/flatpak/flatpak/security/advisories/GHSA-q4gr-vc25-57m5
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