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CVE-2025-59305

Langfuse broken access control

7.6 HIGHPublic exploitEPSS 0.27%
  1. Published24 Sept 2025

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityLow
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

Affected products

Langfuse≥ 3.1.0 < 3.109.0

Remediation

Fixed in
Langfuse≥ 3.109.0

References

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Frequently asked

Is CVE-2025-59305 being actively exploited?

CVE-2025-59305 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.27%.

How severe is CVE-2025-59305?

CVE-2025-59305 has a CVSS 3.1 base score of 7.6, rated high. EPSS estimates a 0.27% probability of exploitation.

Which products are affected by CVE-2025-59305?

Affected products include Langfuse.

How do I fix CVE-2025-59305?

Upgrade affected software to a fixed version, for example Langfuse 3.109.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.