CVE-2026-41487: Langfuse is an open source large language model engineering platform. From version 3.68.0 to before …
- Occurred
- May 8, 2026
- Published
- May 8, 2026
- Source
- NVD CVE
Summary
Langfuse is an open source large language model engineering platform. From version 3.68.0 to before version 3.167.0, there is a role-based-access control flaw in the LLM connection update flow. An authenticated, low-privileged user of role “member” in a project could request the update of an existing LLM connection to an attacker-controlled baseUrl, causing Langfuse to reuse the stored provider secret and redirect the test request to an attacker-controlled endpoint. This could expose the plaintext provider LLM API key for that connection. The attack is only possible if a user is already part of a project and has “member” scoped access. This issue has been patched in version 3.167.0.
Tags
- CVE
- CVE-2026-41487
- cvss:MEDIUM
Classification
Rationale: Role-based access control flaw exposes plaintext LLM API keys to attackers via malicious URL redirection.
Classifier: Qwen/Qwen3.5-35B-A3B-FP8