CVE-2026-116180

vLLM from 0.8.5 before 0.31.0 has a denial of service flaw. LogprobsTensors.empty_cpu() in vllm/v1/outputs.py allocates an uninitialized int32 tensor, and the V1 model runner leaves prompt positions reported as computed by a KV connector unwritten. A client sharing the engine can send prompt_logprobs (or echo with logprobs) against a connector-cached prefix, making tokenizer decode raise OverflowError, which crashes EngineCore and drops all co-tenant requests.

CVSS v3 7.7 HIGH

7.7^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.1 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/vllm-project/vllm/security/advisories/GHSA-rhcx-5729-88vg	Mitigation Vendor Advisory
https://www.vulncheck.com/advisories/vllm-from-0.8.5-before-0.31.0-cross-tenant-dos-via-uninitialized-logprobstensors	Third Party Advisory

Configurations

Configuration 1 (hide)

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

History

28 Oct 2026, 15:40

Type	Values Removed	Values Added
CPE		cpe:2.3:a:vllm:vllm::::::::
References	~~() https://github.com/vllm-project/vllm/security/advisories/GHSA-rhcx-5729-88vg -~~	() https://github.com/vllm-project/vllm/security/advisories/GHSA-rhcx-5729-88vg - Mitigation, Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/vllm-from-0.8.5-before-0.31.0-cross-tenant-dos-via-uninitialized-logprobstensors -~~	() https://www.vulncheck.com/advisories/vllm-from-0.8.5-before-0.31.0-cross-tenant-dos-via-uninitialized-logprobstensors - Third Party Advisory
First Time		Vllm vllm Vllm

25 Oct 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-25 14:16

Updated : 2026-10-28 15:40

NVD link : CVE-2026-116180

Mitre link : CVE-2026-116180

CVE.ORG link : CVE-2026-116180

JSON object : View

Products Affected

vllm

vllm

CWE

CWE-908

Use of Uninitialized Resource

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