High severity · published Apr 7, 2026
CVE-2026-35605
File Browser has an access rule bypass via HasPrefix without trailing separator in path matching
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.1, the Matches() function in rules/rules.go uses strings.HasPrefix() without a trailing directory separator when matching paths against access rules. A rule for /uploads also matches /uploads_backup/, granting or denying access to unintended directories. This vulnerability is fixed in 2.63.1.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
filebrowser · filebrowser
< 2.63.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35605
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-35605
Patch
https://github.com/filebrowser/filebrowser/pull/5889
Exploit
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-5q48-q4fm-g3m6
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