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CVE-2026-26220
Published: Feb 17, 2026
Modified: Feb 17, 2026
PUBLISHED
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.
| Vendor | Product | Versions |
|---|---|---|
ModelTC | LightLLM | affected 0 - <= 1.1.0 |
Weaknesses (CWE)
References
https://chocapikk.com/posts/2026/lightllm-pickle-rce/
technical-description
exploit
https://github.com/ModelTC/LightLLM/issues/1213
issue-tracking
patch
https://www.vulncheck.com/advisories/lightllm-pd-mode-unsafe-deserialization-rce
third-party-advisory
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