High 8.1Published Feb 9, 2026

CVE-2026-25890File Browser has a Path-Based Access Control Bypass via Multiple Leading Slashes in URL

Updated under an hour ago (Oct 26, 2026, 12:23 PM ET)

Does this affect you?

It affects filebrowser. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for filebrowser

Exploited in the last 30 days

File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Prior to 2.57.1, an authenticated user can bypass the application's "Disallow" file path rules by modifying the request URL. By adding multiple slashes (e.g., //private/) to the path, the authorization check fails to match the rule, while the underlying filesystem resolves the path correctly, granting unauthorized access to restricted files. This vulnerability is fixed in 2.57.1.

CVSS: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-706, CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

filebrowser filebrowser filebrowser:filebrowser (from the name)	before 2.57.2	CNA record
filebrowser filebrowser filebrowser:filebrowser	before 2.57.1	NVD

References

https://github.com/filebrowser/filebrowser/security/advisories/GHSA-4mh3-h929-w968x-refsource-confirm, exploit, vendor-advisory
https://github.com/filebrowser/filebrowser/commit/489af403a19057f6b6b4b1dc0e48cbb26a202ef9x-refsource-misc, patch
https://github.com/filebrowser/filebrowser/releases/tag/v2.57.1x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.