CVE-2026-100652

vLLM versions 0.22.0 through 0.23.0 fail to validate stop_token_ids against vocabulary bounds in Rust HTTP and gRPC frontends, allowing out-of-vocabulary token IDs to reach MinTokensLogitsProcessor. Attackers can submit requests with min_tokens greater than zero and out-of-vocabulary stop_token_ids to trigger CUDA tensor indexing failures that leave EngineCore in a fatal state requiring service restart.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

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-qff2-492f-9fm4	Exploit Mitigation Vendor Advisory
https://www.vulncheck.com/advisories/vllm-0.22.0-through-0.23.0-denial-of-service-via-stop-token-ids	Third Party Advisory

Configurations

Configuration 1 (hide)

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

History

06 Oct 2026, 19:22

Type	Values Removed	Values Added
First Time		Vllm vllm Vllm
References	~~() https://github.com/vllm-project/vllm/security/advisories/GHSA-qff2-492f-9fm4 -~~	() https://github.com/vllm-project/vllm/security/advisories/GHSA-qff2-492f-9fm4 - Exploit, Mitigation, Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/vllm-0.22.0-through-0.23.0-denial-of-service-via-stop-token-ids -~~	() https://www.vulncheck.com/advisories/vllm-0.22.0-through-0.23.0-denial-of-service-via-stop-token-ids - Third Party Advisory
CPE		cpe:2.3:a:vllm:vllm::::::::

26 Sep 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-26 14:16

Updated : 2026-10-06 19:22

NVD link : CVE-2026-100652

Mitre link : CVE-2026-100652

CVE.ORG link : CVE-2026-100652

JSON object : View

Products Affected

vllm

vllm

CWE

CWE-20

Improper Input Validation

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