{"id":"CVE-2026-96281","title":"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-d…","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-d…","severity":"medium","cvss":6.2,"cvssVector":"CVSS:3.1/AV:P/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-284"],"vendor":"Red Hat","product":"flatpak","affected":["flatpak (all versions)","flatpak (all versions)","flatpak (all versions)","flatpak (all versions)"],"published":"2026-09-27","updated":"2026-09-30","sourceUpdated":"2026-09-30T21:17:18.823","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-96281","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-96281","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2539421","label":"secalert@redhat.com"},{"url":"https://github.com/flatpak/flatpak/security/advisories/GHSA-q4gr-vc25-57m5","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-96281.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-96281"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96281"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-30T19:41:13.507053Z"},"epss":0.00124,"epssPercentile":0.02098,"ingestedAt":"2026-09-27T21:58:39.827Z","slug":"CVE-2026-96281","body":"## Overview\n\nOn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-09-27 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-96281.json)","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":34.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}