What is CVE-2026-54089?

CVE-2026-54089 is a critical-severity vulnerability in Filebrowser, classified under Improper Authentication. CVSS score: 9.1/10. Published 2026-06-25.

How severe is CVE-2026-54089?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Filebrowser

CVE-2026-54089

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Starting with 2.0.0-rc.1, when FileBrowser is configured with proxy authentication (auth.method=proxy)…

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Filebrowser — versions >= 2.0.0-rc.1

Weakness classification (CWE)

CWE-287 — Improper Authentication
CWE-290 — Authentication Bypass by Spoofing

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-54089?: CVE-2026-54089 is a critical-severity vulnerability in Filebrowser, classified under Improper Authentication. CVSS score: 9.1/10. Published 2026-06-25.
How severe is CVE-2026-54089?: Critical severity. CVSS v3 base score is 9.1 out of 10.