CVE-2026-93436

vLLM through 0.29.0 fails to properly clean up decode-side metadata for rejected inference requests in prefill/decode disaggregated deployments. Remote attackers can submit requests with max_tokens=0 to exhaust decode-worker memory without bound until the worker restarts.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

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	Product
https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/distributed/kv_transfer/kv_connector/v1/nixl/push_worker.py#L162-L181	Product
https://github.com/vllm-project/vllm/pull/55677	Issue Tracking Patch
https://www.vulncheck.com/advisories/vllm-through-0.29.0-memory-exhaustion-via-rejected-requests	Third Party Advisory

Configurations

Configuration 1 (hide)

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

History

28 Sep 2026, 18:37

Type	Values Removed	Values Added
First Time		Vllm vllm Vllm
CPE		cpe:2.3:a:vllm:vllm::::::::
References	~~() https://github.com/vllm-project/vllm -~~	() https://github.com/vllm-project/vllm - Product
References	~~() https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/distributed/kv_transfer/kv_connector/v1/nixl/push_worker.py#L162-L181 -~~	() https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/distributed/kv_transfer/kv_connector/v1/nixl/push_worker.py#L162-L181 - Product
References	~~() https://github.com/vllm-project/vllm/pull/55677 -~~	() https://github.com/vllm-project/vllm/pull/55677 - Issue Tracking, Patch
References	~~() https://www.vulncheck.com/advisories/vllm-through-0.29.0-memory-exhaustion-via-rejected-requests -~~	() https://www.vulncheck.com/advisories/vllm-through-0.29.0-memory-exhaustion-via-rejected-requests - Third Party Advisory

17 Sep 2026, 23:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 23:18

Updated : 2026-09-28 18:37

NVD link : CVE-2026-93436

Mitre link : CVE-2026-93436

CVE.ORG link : CVE-2026-93436

JSON object : View

Products Affected

vllm

vllm

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

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