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CRITICALCVE-2026-26220Published Modified CNA VulnCheck

CVE-2026-26220: LightLLM <= 1.1.0 PD Mode Unsafe Deserialization RCE

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.

Metrics

CVSS v4.0
9.3
Severity
CRITICAL
Fixed in
—
Affected Products
1
Affected packages
  • ModelTC / LightLLM
    ≤ 1.1.0
CVSS Vector
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
References