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  5. CVE-2026-25889

CVE-2026-25889: File Browser has an Authentication Bypass in User Password Update

February 10, 2026

A case-sensitivity flaw in the password validation logic allows any authenticated user to change their password (or an admin to change any user’s password) without providing the current password. By using Title Case field name "Password" instead of lowercase "password" in the API request, the current_password verification is completely bypassed. This enables account takeover if an attacker obtains a valid JWT token through XSS, session hijacking, or other means.

CVSS Score: 7.5 (High) CWE: CWE-178 (Improper Handling of Case Sensitivity)


References

  • github.com/advisories/GHSA-hxw8-4h9j-hq2r
  • github.com/filebrowser/filebrowser
  • github.com/filebrowser/filebrowser/commit/ff2f00498cff151e2fb1f5f0b16963bf33c3d6d4
  • github.com/filebrowser/filebrowser/releases/tag/v2.57.1
  • github.com/filebrowser/filebrowser/security/advisories/GHSA-hxw8-4h9j-hq2r
  • nvd.nist.gov/vuln/detail/CVE-2026-25889

Code Behaviors & Features

Detect and mitigate CVE-2026-25889 with GitLab Dependency Scanning

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Affected versions

All versions before 2.57.1

Fixed versions

  • 2.57.1

Solution

Upgrade to version 2.57.1 or above.

Impact 5.4 MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Learn more about CVSS

Weakness

  • CWE-178: Improper Handling of Case Sensitivity

Source file

go/github.com/filebrowser/filebrowser/v2/CVE-2026-25889.yml

Spotted a mistake? Edit the file on GitLab.

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