CVE-2026-73611

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.

CVSS 4.0

7.6CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

6.8CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-25)

CWE

CWE-613

Published

2026-08-13

Modified

2026-09-30

Record from

the NVD, synced 2026-10-19

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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