What is the CVSS score of CVE-2026-54685?

CVE-2026-54685 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.3%.

Is there a patch available for CVE-2026-54685?

Yes, a patch is available for CVE-2026-54685. Update the affected software to the latest version immediately.

FileBrowser Quantum CVE-2026-54685

EUVD-2026-45953 MEDIUM

Observable Timing Discrepancy (CWE-208)

2026-07-20 GitHub_M

GHSA-7789-65hx-f26w

Information Disclosure Filebrowser

5.3

CVSS 3.1 · Vendor: GitHub_M

Severity by source

Vendor (GitHub_M) PRIMARY

5.3 MEDIUM

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

vuln.today AI

5.3 MEDIUM

Network-accessible login endpoint requires no authentication; impact is limited to username enumeration (C:L) with no integrity or availability effect.

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

4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

Patch available

Jul 20, 2026 - 17:02 EUVD

Source Code Evidence Fetched

Jul 20, 2026 - 15:06 vuln.today

Analysis Generated

Jul 20, 2026 - 15:06 vuln.today

DescriptionCVE.org

FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to version 1.3.2-beta, the /api/auth/login authentication endpoint does not execute in constant time. When a non-existent username is supplied, the server returns a 401/403 response almost immediately. When a valid username is provided, the server performs a bcrypt password comparison, causing a measurable delay in the response time. Version 1.3.2-beta patches the issue.

AnalysisAI

Username enumeration via authentication timing side-channel in FileBrowser Quantum's /api/auth/login endpoint allows unauthenticated remote attackers to distinguish valid from invalid usernames by measuring response latency. Valid usernames trigger a bcrypt password hash comparison (~40-50 ms), while non-existent usernames return almost immediately (~1-4 ms), creating a statistically exploitable timing differential. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Send login requests with candidate usernames

Delivery

Calibrate baseline latency using invalid-username responses

Exploit

Measure per-username response time

Execution

Identify valid usernames exceeding timing threshold

Impact

Use enumerated usernames in credential stuffing or brute-force campaign

Access

Send login requests with candidate usernames

Delivery

Calibrate baseline latency using invalid-username responses

Exploit

Measure per-username response time

Execution

Identify valid usernames exceeding timing threshold

Impact

Use enumerated usernames in credential stuffing or brute-force campaign

Vulnerability AssessmentAI

Exploitation	No special configuration or elevated privileges are required - the timing side-channel exists in the default authentication code path of any internet-accessible FileBrowser Quantum instance prior to version 1.3.2-beta. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	The CVSS 3.1 score of 5.3 Medium (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) accurately reflects remote, unauthenticated exploitability with a limited confidentiality-only impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An unauthenticated remote attacker sends POST requests to `/api/auth/login` with a list of candidate usernames and a deliberately incorrect password, measuring the response time for each attempt. After calibrating a baseline latency using known-invalid usernames (~1-4 ms), the attacker identifies any response exceeding the statistical threshold (~40-50 ms) as belonging to a valid account. …
Remediation	Upgrade to FileBrowser Quantum version 1.3.2-beta or later, available at https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.3.2-beta. … Detailed patch versions, workarounds, and compensating controls in full report.