Exposed Access Flaw in FileBrowser Quantum by GT Steffaniak
CVE-2026-27611

7.1HIGH

Key Information:

Vendor

Gtsteffaniak

Status
Filebrowser
Vendor
CVE Published:
25 February 2026

What is CVE-2026-27611?

A serious flaw in FileBrowser Quantum, a self-hosted web-based file manager, allows users to bypass password protections on shared files. Specifically, prior to versions 1.1.3-stable and 1.2.6-beta, the system inadequately secured the sharing mechanism. The API inadvertently provided a direct download link accessible through the share link alone, enabling unauthorized access without the need for the password. This vulnerability was addressed in subsequent software updates to safeguard user data.

Affected Version(s)

filebrowser < 1.1.3-stable < 1.1.3-stable

filebrowser >= 1.2.0-beta, < 1.2.6-beta < 1.2.0-beta, 1.2.6-beta

References

https://github.com/gtsteffaniak/filebrowser/security/advi...
x_refsource_CONFIRM
https://github.com/gtsteffaniak/filebrowser/commit/c51b0e...
x_refsource_MISC

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.