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SCA: security update for github.com/filebrowser/filebrowser/v2 (GHSA-43mm-m3h2-3prc)

medium Tenable Cloud Security Plugin ID 436830

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - File Browser provides a file managing interface within a specified directory and can be used to upload,
 delete, preview, rename, and edit files. Prior to version 2.55.0, the JSONAuth. Auth function contains a
 logic flaw that allows unauthenticated attackers to enumerate valid usernames by measuring the response
 time of the /api/login endpoint. The vulnerability exists due to a "short-circuit" evaluation in the
 authentication logic. When a username is not found in the database, the function returns immediately.
 However, if the username does exist, the code proceeds to verify the password using bcrypt
 (users.CheckPwd), which is a computationally expensive operation designed to be slow. This difference in
 execution path creates a measurable timing discrepancy. Version 2.55.0 contains a patch for the issue.
 (CVE-2026-23849)

See Also

https://github.com/advisories/GHSA-43mm-m3h2-3prc

Plugin Details

Severity: Medium

ID: 436830

Version: Revision 1.8

Type: Local

Family: SCA Checks

Published: 1/21/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2026-23849

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/21/2026

Vulnerability Publication Date: 1/19/2026

Reference Information

CVE: CVE-2026-23849