---
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
published: '2026-08-13'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:32:39.347'
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
epss: 0.00434
epssPercentile: 0.35015
ingestedAt: '2026-09-08T21:11:12.276Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.