CVE-2026-94625

MEDIUM 5.3

vLLM through 0.29.0 Resource Exhaustion via Ownerless Mooncake Transfer Placeholders

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

vLLM through 0.29.0 contains a resource exhaustion vulnerability in MooncakeConnector where rejected prefill requests create ownerless transfer placeholders that are never reclaimed. Attackers can send rejected requests to exhaust sender task pools, causing valid requests to be delayed by up to 480 seconds while health checks continue returning success.

CWE	CWE-772
Vendor	vllm-project
Product	vllm
Published	Sep 21, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

vllm-project / vllm

0 ≤ 0.29.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/vllm-project/vllm/pull/51236 github.com: https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/distributed/kv_transfer/kv_connector/v1/mooncake/mooncake_connector.py#L1234-L1242 github.com: https://github.com/vllm-project/vllm vulncheck.com: https://www.vulncheck.com/advisories/vllm-through-0.29.0-resource-exhaustion-via-ownerless-mooncake-transfer-placeholders

Credits

Mingkai Yu Jiapeng Li Jiajia Liu