CVE-2026-90919

Summary

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.

Affected Software

Weaknesses

• CWE-502: Deserialization of Untrusted Data

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: total

Additional References

• https://github.com/ModelTC/LightLLM/issues/1563

References

• https://github.com/ModelTC/LightLLM/issues/1563
• https://github.com/ModelTC/LightLLM/blob/v1.2.0/lightllm/server/config_server/api_http.py#L79-L86
• https://github.com/ModelTC/lightllm
• https://www.vulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-remote-code-execution-via-config-server-pickle-deserialization

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