Filebrowser
CVE-2026-23849
MEDIUM
GHSA-43mm-m3h2-3prc
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Primary rating from GitHub Advisory.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Lifecycle Timeline
4DescriptionGitHub Advisory
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.
AnalysisAI
Filebrowser versions up to 2.55.0 contains a vulnerability that allows attackers to enumerate valid usernames by measuring the response time of the /api/login endpo (CVSS 5.3).
Technical ContextAI
affects Filebrowser. 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 retur
RemediationAI
A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.
More in Filebrowser
View allUnauthorized file operations in File Browser before fix. PoC and patch available.
A cross-site scripting (XSS) vulnerability in FileBrowser before v2.23.0 allows an authenticated attacker to escalate pr
Path normalization bypass in Filebrowser prior to 2.57.1 allows authenticated users to circumvent file access restrictio
File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, previ
File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, previ
File Browser versions prior to 2.61.0 incorrectly set the filesystem root to a parent directory when generating public s
File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, previ
File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, previ
Filebrowser versions prior to 2.57.1 allow authenticated users to reset passwords without verifying the current password
Path traversal in FileBrowser Quantum (gtsteffaniak fork) versions prior to 1.3.2-stable, 1.4.0-beta, and 1.4.1-beta all
Pre-authentication remote code execution in File Browser before 2.63.6 lets unauthenticated attackers run arbitrary OS c
Authentication bypass and privilege escalation in File Browser (versions 2.0.0-rc.1 and later) lets a remote unauthentic
Same weakness CWE-208 – Observable Timing Discrepancy
View allSame technique Information Disclosure
View allVendor StatusVendor
SUSE
Severity: Medium| Product | Status |
|---|---|
| openSUSE Leap 15.6 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | Fixed |
| openSUSE Leap 15.5 | Fixed |
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External POC / Exploit Code
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