High severity · published Aug 13, 2026
CVE-2026-73612
File Browser before v2.63.22 Authorization Bypass via Recursive Operations
8.1
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
filebrowser · filebrowser
before 2.63.22 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73612
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73612
github.com
https://github.com/filebrowser/filebrowser/commit/72faf6dd3c85628e332d3e567124b86708ce2695
github.com
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-77x8-73f4-5485
www.vulncheck.com
https://www.vulncheck.com/advisories/file-browser-before-authorization-bypass-via-recursive-operations
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