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.

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Fixes

Solution

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Workaround

Ensure that Flatpak apps installed system-wide are fully updated before running them.

History

Sun, 27 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.2, 'vector': 'CVSS:3.1/AV:P/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H'}


Sun, 27 Sep 2026 21:15:00 +0000

Type Values Removed Values Added
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.
Title Flatpak: flatpak: unprivileged active user can bypass anti-downgrade checks for system apps/runtimes
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-284
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-27T21:16:34.274Z

Reserved: 2026-09-22T20:43:45.571Z

Link: CVE-2026-96281

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-27T21:17:04.330

Modified: 2026-09-27T21:17:04.330

Link: CVE-2026-96281

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses