What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-07 · updated 2026-06-17
• Weakness: CWE-22

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 products

• filebrowser: before 2.63.1 — fixed in 2.63.1

How to fix

Upgrade to a fixed version: filebrowser 2.63.1. Check the vendor advisory for mitigations.

References

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

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