Vulnerability · Published Apr 7, 2026 · Assigned by GitHub_M

CVE-2026-35605File Browser has an access rule bypass via HasPrefix without trailing separator in path matching

High 7.5

In plain English

A high-severity path traversal in filebrowser from filebrowser. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 64.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/filebrowser/filebrowser	no fix listed	GO-2026-5150
Go	github.com/filebrowser/filebrowser/v2	2.63.1	GHSA-5q48-q4fm-g3m6
Go	github.com/filebrowser/filebrowser/v2	2.63.1	GO-2026-5150

Affected products (as reported)

Vendor	Product	Versions
filebrowser	filebrowser	< 2.63.1

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

https://github.com/filebrowser/filebrowser/security/advisories/GHSA-5q48-q4fm-g3m6 x_refsource_CONFIRM
https://github.com/filebrowser/filebrowser/pull/5889 x_refsource_MISC