CVE-2026-116181

vLLM from 0.20.1 before 0.29.0 contains an improper input validation vulnerability that allows remote attackers to crash the engine by supplying out-of-vocabulary stop_token_ids. Attackers can send OpenAI chat, completion, generate, or batch requests with invalid IDs to terminate the engine or write outside the V2 runner's logits buffer.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/vllm-project/vllm/security/advisories/GHSA-w9r6-29q4-pvpr	Patch Vendor Advisory
https://www.vulncheck.com/advisories/vllm-0.20.1-before-0.29.0-dos-and-gpu-out-of-bounds-write-via-stop-token-ids	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*

History

28 Oct 2026, 15:39

Type	Values Removed	Values Added
References	~~() https://github.com/vllm-project/vllm/security/advisories/GHSA-w9r6-29q4-pvpr -~~	() https://github.com/vllm-project/vllm/security/advisories/GHSA-w9r6-29q4-pvpr - Patch, Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/vllm-0.20.1-before-0.29.0-dos-and-gpu-out-of-bounds-write-via-stop-token-ids -~~	() https://www.vulncheck.com/advisories/vllm-0.20.1-before-0.29.0-dos-and-gpu-out-of-bounds-write-via-stop-token-ids - Third Party Advisory
First Time		Vllm vllm Vllm
CPE		cpe:2.3:a:vllm:vllm::::::::

25 Oct 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-25 14:16

Updated : 2026-10-29 20:17

NVD link : CVE-2026-116181

Mitre link : CVE-2026-116181

CVE.ORG link : CVE-2026-116181

JSON object : View

Products Affected

vllm

vllm

CWE

CWE-129

Improper Validation of Array Index

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