Medium severity · published Aug 13, 2026
CVE-2026-73611
File Browser 2.50.0 through 2.63.21 JWT Expiration Bypass
6.8
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
filebrowser · filebrowser
2.50.0 through 2.63.21 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73611
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73611
vendor-advisory
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-v3jv-rmh2-635j
patch
https://github.com/filebrowser/filebrowser/commit/72faf6dd3c85628e332d3e567124b86708ce2695
third-party-advisory
https://www.vulncheck.com/advisories/file-browser-through-jwt-expiration-bypass
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