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Vulnerability record · CVE-2026-73611 · published 13 August 2026

CVE-2026-73611: Insufficient session expiration vulnerability

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.

7.6 CVSS 4.0 High EPSS 0.43% · top 64.8% CWE-613 · Insufficient session expiration Deferred
7.6CVSS 4.0 base score
0.43%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
8 Sep 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
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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Source: NIST National Vulnerability Database (record CVE-2026-73611), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.