{"id":"CVE-2026-76925","title":"A flaw was found in Flatpak","summary":"A flaw was found in Flatpak. A Time-of-check to time-of-use (TOCTOU) race condition exists in the `org.freedesktop.Flatpak.SystemHelper` component. This vulnerability occurs because a privileged `chmod` operation executes before the OSTr…","severity":"medium","cvss":5.8,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L","cwe":["CWE-367"],"vendor":"Red Hat","product":"flatpak","affected":["flatpak (all versions)","flatpak (all versions)","flatpak (all versions)","flatpak (all versions)"],"published":"2026-09-04","updated":"2026-09-08","sourceUpdated":"2026-09-08T19:08:15.590","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-76925","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-76925","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2520099","label":"secalert@redhat.com"}],"tags":["nvd","cve.org"],"epss":0.00098,"epssPercentile":0.00864,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-08T13:00:30.486927Z"},"ingestedAt":"2026-09-08T15:33:26.965Z","slug":"CVE-2026-76925","body":"## Overview\n\nA flaw was found in Flatpak. A Time-of-check to time-of-use (TOCTOU) race condition exists in the `org.freedesktop.Flatpak.SystemHelper` component. This vulnerability occurs because a privileged `chmod` operation executes before the OSTree repository validation within the `Deploy()` function. An attacker can exploit this timing window to redirect symlinks to arbitrary files, potentially leading to unauthorized file manipulation or information disclosure.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":31.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}