{"id":"CVE-2026-73611","title":"File Browser versions from 2.50.0 through 2.63.21 fail to validate JWT expiration when proxy authentication is configured with a non-default logout page","summary":"File Browser versions from 2.50.0 through 2.63.21 fail to validate JWT expiration when proxy authentication is configured with a non-default logout page. Attackers with a previously valid token can access protected routes and administrat…","severity":"medium","cvss":6.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-613"],"vendor":"filebrowser","product":"filebrowser","affected":["filebrowser >= 2.50.0 <= 2.63.21"],"published":"2026-08-13","updated":"2026-09-30","sourceUpdated":"2026-09-30T18:18:39.790","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73611","references":[{"url":"https://github.com/filebrowser/filebrowser/commit/72faf6dd3c85628e332d3e567124b86708ce2695","label":"disclosure@vulncheck.com"},{"url":"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-v3jv-rmh2-635j","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/file-browser-through-jwt-expiration-bypass","label":"disclosure@vulncheck.com"},{"url":"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-v3jv-rmh2-635j","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00434,"epssPercentile":0.37544,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-08-14T22:29:39.172759Z"},"ingestedAt":"2026-09-08T21:11:12.276Z","slug":"CVE-2026-73611","body":"## Overview\n\nFile Browser versions from 2.50.0 through 2.63.21 fail to validate JWT expiration when proxy authentication is configured with a non-default logout page. Attackers with a previously valid token can access protected routes and administrative endpoints indefinitely, and exchange expired tokens for fresh ones via the renewal endpoint.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":37.4,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":213846,"id":"CVE-2026-73611","ts":1790792437397,"field":"exploit_available","old":"false","new":"true"}]}