CVE-2026-114051
Published:October 21, 2026
Updated:October 21, 2026
vLLM before 0.31.0 skips the min_tokens <= max_tokens check for /inference/v1/generate requests with a null max_tokens, so the EngineCore input thread later dies on an uncaught VLLMValidationError while /health still returns 200. Unauthenticated remote attackers can send one request with an oversized min_tokens to hang all subsequent generation requests until manual restart.
Affected Packages
vllm (CONDA):
Affected version(s) >=0.19.1 <0.31.0Fix Suggestion:
Update to version 0.31.0https://github.com/vllm-project/vllm.git (GITHUB):
Affected version(s) >=v0.11.1 <v0.31.0Fix Suggestion:
Update to version v0.31.0vllm (PYTHON):
Affected version(s) >=0.11.1 <0.31.0Fix Suggestion:
Update to version 0.31.0Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Uncaught Exception