CVE-2026-90919

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-14 12:17

Updated : 2026-09-14 15:17

NVD link : CVE-2026-90919

Mitre link : CVE-2026-90919

CVE.ORG link : CVE-2026-90919

JSON object : View

Products Affected

No product.

CWE

CWE-502

Deserialization of Untrusted Data

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