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TI-2025-36879 Aliases CVE-2025-59305GHSA-9m9r-362p-h3rf

Improper authorization in the background migration endpoints of Langfuse 3.1 before…

Priority HIGH 66CWE-285Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · Low · Low
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-285.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00281 20th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:langfuse:langfuse:*:*:*:*:*:*:*:*3.1.0 to before 3.109.0Vulnerablelangfuse
  • cpe:2.3:a:langfuse:langfuse:*:*:*:*:*:*:*:* Versions 3.1.0 to before 3.109.0 Vulnerable ·langfuse

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-59305
  2. 2026-10-03 Alias added: GHSA-9m9r-362p-h3rf

References

Exploit 1

  • TI-2026-19383 Langfuse Slack OAuth Installation Endpoint Lacks Authentication, Enabling Arbitrary Project Linking CVSS 4.0MEDIUM 6.3
  • TI-2025-08988 Langfuse Webhook promptRouter.ts promptChangeEventSourcing server-side request forgery CVSS 4.0LOW 2.3
  • TI-2026-30074 Improper access control in langfuse CVSS 4.0MEDIUM 5.3
  • TI-2025-40259 Langfuse SSO Account Takeover via CSRF or phishing attack CVSS 3.1MEDIUM 6.5
  • TI-2025-39896 Langfuse vulnerable to cross‑organization enumeration of member & invitation lists via project membership APIs CVSS 3.1MEDIUM 5.0

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences