CVE-2026-73612: File Browser before v2.63.22 Authorization Bypass via Recursive Operations

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-13 · updated 2026-09-08
Weakness: CWE-639

Description

File Browser before v2.63.22 fails to validate access rules for descendants during recursive copy, rename, and delete operations, allowing authenticated users to bypass path-based access controls. Attackers can copy, rename, or delete denied files by operating on their allowed parent directory, defeating rule-based isolation for confidentiality and integrity.

Affected products

filebrowser: before 2.63.22 — fixed in 2.63.22

How to fix

Upgrade to a fixed version: filebrowser 2.63.22. Check the vendor advisory for mitigations.

References

https://github.com/filebrowser/filebrowser/commit/72faf6dd3c85628e332d3e567124b86708ce2695
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-77x8-73f4-5485
https://www.vulncheck.com/advisories/file-browser-before-authorization-bypass-via-recursive-operations
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-77x8-73f4-5485

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