CVE-2025-59305: Langfuse

High severity, CVSS 7.6. EPSS: 0.3% chance of exploitation in the next 30 days.

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

• Langfuse Langfuse: from 3.1.0, before 3.109.0 (fixed in 3.109.0)

Published 2025-09-24. Last modified 2026-06-17.