CVE-2026-90919 [CRITICAL] – LightLLM through 1.2.0 contains a remote code execution vulnerability in the Config Server

LightLLM through 1.2.0 contains a remote code execution vulnerability in the Config Server’s unauthenticated /visual_register WebSocket endpoint that passes the first client frame directly to pickle.loads(). Attackers can reach the Config Server port and send a malicious serialized payload with a __reduce__ method to execute arbitrary code with Config Server process privileges.