CVE-2026-26220
9.3
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
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| ModelTC | LightLLM | 0 <= 1.1.0 | affected |
Weaknesses
- CWE-502: CWE-502 Deserialization of Untrusted Data
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: yes
- Technical Impact: total
References
- 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
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.