CVE-2026-26220

LightLLM version 1.1.0 and prior contain an unauthenticated remote code execution vulnerability in PD (prefill-decode) disaggregation mode. The PD master node exposes WebSocket endpoints that receive binary frames and pass the data directly to pickle.loads() without authentication or validation. A remote attacker who can reach the PD master can send a crafted payload to achieve arbitrary code execution.

CVSS

No CVSS.

References

Link	Resource
https://chocapikk.com/posts/2026/lightllm-pickle-rce/
https://github.com/ModelTC/LightLLM/issues/1213
https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L310
https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L331
https://lightllm-en.readthedocs.io/en/latest/index.html
https://www.vulncheck.com/advisories/lightllm-pd-mode-unsafe-deserialization-rce

Configurations

No configuration.

History

18 Feb 2026, 17:52

Type	Values Removed	Values Added
Summary		(es) La versión 1.1.0 y anteriores de LightLLM contienen una vulnerabilidad de ejecución remota de código no autenticada en el modo de desagregación PD (prefill-decode). El nodo maestro PD expone puntos finales WebSocket que reciben tramas binarias y pasan los datos directamente a pickle.loads() sin autenticación ni validación. Un atacante remoto que puede alcanzar el maestro PD puede enviar una carga útil manipulada para lograr la ejecución de código arbitrario.

17 Feb 2026, 03:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-17 03:16

Updated : 2026-02-18 17:52

NVD link : CVE-2026-26220

Mitre link : CVE-2026-26220

CVE.ORG link : CVE-2026-26220

JSON object : View

Products Affected

No product.

CWE

CWE-502

Deserialization of Untrusted Data

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