What is CVE-2025-59305?

CVE-2025-59305 is a high-severity vulnerability in Langfuse, classified under Improper Authorization. CVSS score: 7.6/10. Published 2025-09-24.

How severe is CVE-2025-59305?

High severity. CVSS v3 base score is 7.6 out of 10.

Is CVE-2025-59305 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Langfuse

CVE-2025-59305

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 acc…

EPSS: 0.003 (17.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L.

Affected products

Langfuse
N/a — versions n/a

Weakness classification (CWE)

CWE-285 — Improper Authorization

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-59305?: CVE-2025-59305 is a high-severity vulnerability in Langfuse, classified under Improper Authorization. CVSS score: 7.6/10. Published 2025-09-24.
How severe is CVE-2025-59305?: High severity. CVSS v3 base score is 7.6 out of 10.
Is CVE-2025-59305 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.