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LightLLM CVE-2026-26220

Deserialization of Untrusted Data (CWE-502)
2026-02-17 disclosure@vulncheck.com

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Feb 17, 2026 - 03:16 nvd
N/A

DescriptionCVE.org

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.

AnalysisAI

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.

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Risk Assessment Exploitation no authentication required. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario A remote attacker without authentication could exploit this vulnerability to compromise the affected system.
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CVE-2026-26220 vulnerability details – vuln.today

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