File Browser 2.50.0 through 2.63.21 JWT Expiration Bypass

{
  "id": "114a6d0c5510a7448c9a305fbcad3bf9d29d8470435e2b6ac1b42922dcac5f1e",
  "url": "https://osv.dev/vulnerability/CVE-2026-73611",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "File Browser 2.50.0 through 2.63.21 JWT Expiration Bypass",
    "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 administrative endpoints indefinitely, and exchange expired tokens for fresh ones via the renewal endpoint.",
    "evidence": "osv:CVE-2026-73611",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-73611",
      "aliases": [
        "CVE-2026-73611",
        "GHSA-v3jv-rmh2-635j"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/filebrowser/filebrowser",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4302ece49b9dcccec93050045de6b219e8bacc58"
                },
                {
                  "fixed": "72faf6dd3c85628e332d3e567124b86708ce2695"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2.50.0"
                      },
                      {
                        "last_affected": "2.63.21"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "72faf6dd3c85628e332d3e567124b86708ce2695"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.63.21",
            "v2.63.20",
            "v2.63.19",
            "v2.63.18",
            "v2.63.17",
            "v2.63.16",
            "v2.63.15",
            "v2.63.14",
            "v2.63.13",
            "v2.63.12",
            "v2.63.11",
            "v2.63.10",
            "v2.63.9",
            "v2.63.8",
            "v2.63.7",
            "v2.63.6",
            "v2.63.5",
            "v2.63.4",
            "v2.63.3",
            "v2.63.1",
            "v2.63.0",
            "v2.62.2",
            "v2.62.1",
            "v2.62.0",
            "v2.61.2",
            "v2.61.1",
            "v2.61.0",
            "v2.60.0",
            "v2.59.0",
            "v2.58.0",
            "v2.57.1",
            "v2.57.0",
            "v2.56.0",
            "v2.55.0",
            "v2.54.0",
            "v2.53.1",
            "v2.53.0",
            "v2.52.0",
            "v2.51.2",
            "v2.51.1",
            "v2.51.0",
            "v2.50.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73611.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.903331369Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73611.json",
        "https://github.com/filebrowser/filebrowser/security/advisories/GHSA-v3jv-rmh2-635j",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-73611",
        "https://www.vulncheck.com/advisories/file-browser-through-jwt-expiration-bypass",
        "https://github.com/filebrowser/filebrowser/commit/72faf6dd3c85628e332d3e567124b86708ce2695"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-613"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73611.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-73611",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499097,
  "published_at": "2026-08-13T11:28:15.147+00:00"
}