{"affected":[{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"flatpak","product":"Red Hat Enterprise Linux 10","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"flatpak","product":"Red Hat Enterprise Linux 7","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"flatpak","product":"Red Hat Enterprise Linux 8","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"flatpak","product":"Red Hat Enterprise Linux 9","source":"CNA: redhat","vendor":"Red Hat","versions":[]}],"cveId":"CVE-2026-96281","cwes":["CWE-284"],"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.","epss":{"date":"2026-11-05","percentile":0.02127,"score":0.00124},"exploits":[],"kev":null,"metrics":[{"score":6.2,"severity":"medium","source":"CNA: redhat","vector":"CVSS:3.1/AV:P/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793931259696,"publishedAt":1790542817262,"references":[{"source":"CNA: redhat","tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-96281"},{"source":"CNA: redhat","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2539421"},{"source":"CNA: redhat","tags":[],"url":"https://github.com/flatpak/flatpak/security/advisories/GHSA-q4gr-vc25-57m5"}],"remediation":[{"kind":"workaround","source":"CNA: redhat","text":"Ensure that Flatpak apps installed system-wide are fully updated before running them."}],"revision":"5bcbbd2a5c35e82419aab5b0ce72819f8ad4218213f0839ae1992d81b5e11c89","sources":[{"modifiedAt":1793931259696,"name":"CNA: redhat","retrievedAt":1793934546604,"url":"https://www.cve.org/CVERecord?id=CVE-2026-96281"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793934555730,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-96281"}],"ssvc":{"assessedAt":1790797273507,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Flatpak: flatpak: unprivileged active user can bypass anti-downgrade checks for system apps/runtimes","updatedAt":1793934555730}