What is the CVSS score of CVE-2025-59305?

CVE-2025-59305 has a CVSS 3.1 base score of 7.6 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L. EPSS exploitation probability: 0.1%.

Which versions of Langfuse are affected by CVE-2025-59305?

Organizations using the background migration endpoints of Langfuse 3.1 face notable risk from CVE-2025-59305 rated CVSS 7.6. Exploitation could compromise the security of affected deployments.

Is there a public PoC exploit available for CVE-2025-59305?

Yes, a public proof-of-concept exploit is available for CVE-2025-59305. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-59305?

Within 30 days: Identify all affected systems running the background migration endpoints of Langfuse 3.1 and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Langfuse CVE-2025-59305

HIGH

Improper Authorization (CWE-285)

2025-09-24 cve@mitre.org

Authentication Bypass Denial Of Service Langfuse

7.6

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.6 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:14 vuln.today

PoC Detected

Dec 02, 2025 - 18:09 vuln.today

Public exploit code

CVE Published

Sep 24, 2025 - 18:15 nvd

HIGH 7.6

DescriptionCVE.org

Improper authorization in the background migration endpoints of Langfuse 3.1 before d67b317 allows any authenticated user to invoke migration control functions. This can lead to data corruption or denial of service through unauthorized access to TRPC endpoints such as backgroundMigrations.all, backgroundMigrations.status, and backgroundMigrations.retry.

AnalysisAI

Improper authorization in the background migration endpoints of Langfuse 3.1 before d67b317 allows any authenticated user to invoke migration control functions. Rated high severity (CVSS 7.6), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-285. Improper authorization in the background migration endpoints of Langfuse 3.1 before d67b317 allows any authenticated user to invoke migration control functions. This can lead to data corruption or denial of service through unauthorized access to TRPC endpoints such as backgroundMigrations.all, backgroundMigrations.status, and backgroundMigrations.retry. Affected products include: Langfuse.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.