Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
ModelTC LightLLM
Default version status: unknown
0 to ≤ 1.1.0affected
pkg:github/ModelTC/lightllmReferences
- https://chocapikk.com/posts/2026/lightllm-pickle-rce/ ↗
- https://github.com/ModelTC/LightLLM/issues/1213 ↗
- https://lightllm-en.readthedocs.io/en/latest/index.html ↗
- 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://www.vulncheck.com/advisories/lightllm-pd-mode-unsafe-deserialization-rce ↗