What’s Vulnerable › Vulnerabilities

CVE-2026-73611: File Browser 2.50.0 through 2.63.21 JWT Expiration Bypass

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-13 · updated 2026-09-30
• Weakness: CWE-613

Description

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.

Affected products

• filebrowser: from 2.50.0 through 2.63.21

References

• https://github.com/filebrowser/filebrowser/commit/72faf6dd3c85628e332d3e567124b86708ce2695
• https://github.com/filebrowser/filebrowser/security/advisories/GHSA-v3jv-rmh2-635j
• https://www.vulncheck.com/advisories/file-browser-through-jwt-expiration-bypass
• https://github.com/filebrowser/filebrowser/security/advisories/GHSA-v3jv-rmh2-635j

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