# CVE-2026-90919

## Summary

- **CVE ID:** CVE-2026-90919
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-502
- **Published:** Sep 14, 2026
- **Last Modified:** Sep 14, 2026

## Description

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 Products

- ModelTC — LightLLM (0)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.01%
- **EPSS Percentile:** 61.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._