CVEvulnerability
CVE-2026-26220
9.3 CRITICAL
Official page ↗
- Status
- Deferred
- Published
- 2026-02-17
- Last modified
- 2026-07-14
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 9.3 CRITICAL — 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Weaknesses
- CWE-502
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.
Related
Weakness · CWE (1)
- CWE-502 Deserialization of Untrusted Data weakness
References
- https://chocapikk.com/posts/2026/lightllm-pickle-rce/ chocapikk.com
- https://github.com/ModelTC/LightLLM/issues/1213 github.com
- https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L310 github.com
- https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L331 github.com
- https://lightllm-en.readthedocs.io/en/latest/index.html lightllm-en.readthedocs.io
- https://www.vulncheck.com/advisories/lightllm-pd-mode-unsafe-deserialization-rce www.vulncheck.com