5.3
CVE-2026-23849
- EPSS 0.42%
- Veröffentlicht 19.01.2026 20:37:29
- Zuletzt bearbeitet 03.02.2026 14:30:45
- Quelle security-advisories@github.com
- CVE-Watchlists
- Unerledigt
File Browser vulnerable to Username Enumeration via Timing Attack in /api/login
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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Filebrowser ≫ Filebrowser Version < 2.55.0
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. 
Login
Login| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.42% | 0.332 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| security-advisories@github.com | 5.3 | 3.9 | 1.4 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
|
CWE-203 Observable Discrepancy
The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.
CWE-208 Observable Timing Discrepancy
Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-43mm-m3h2-3prc
https://github.com/filebrowser/filebrowser/commit/24781badd413ee20333aba5cce1919d676e01889