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CVE-2026-94625— vLLM through 0.29.0 Resource Exhaustion via Ownerless Mooncake Transfer Placeholders

Quick assessment

Affected
vllm-project vllm
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 va

CVSS 5.3 · Medium EPSS 0.30% · P23

Affected Version Matrix 1

VendorProduct Version RangeStatus
vllm-project vllm ≤ 0.29.0 affected
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I. Basic Information for CVE-2026-94625

Vulnerability Information

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Vulnerability Title
vLLM through 0.29.0 Resource Exhaustion via Ownerless Mooncake Transfer Placeholders
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对已超过有效生命周期的资源丧失索引
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
vllm-project vllm 0 ~ 0.29.0 -

II. Public POCs for CVE-2026-94625

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III. Intelligence Information for CVE-2026-94625

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Patches & Fixes for CVE-2026-94625 (1)

Other References for CVE-2026-94625 (1)

Other References for CVE-2026-94625 (1)

Same Patch Batch · vllm-project · 2026-09-21 · 6 CVEs total

CVE-2026-94627 7.5 HIGH vLLM through 0.29.0 GPU KV Cache Leak via Mooncake Transfer ID Collision
CVE-2026-94624 7.5 HIGH vLLM through 0.29.0 Denial of Service via Unbounded P2P KV Offloading Sessions
CVE-2026-94623 7.5 HIGH vLLM through 0.29.0 Denial of Service via NIXL Multi-Prompt Assertion Failure
CVE-2026-94626 7.5 HIGH vLLM through 0.29.0 Memory Exhaustion via Unvalidated NIXL tp_size
CVE-2026-94622 7.5 HIGH vLLM through 0.29.0 Denial of Service via Incomplete NIXL KV Transfer Metadata

IV. Related Vulnerabilities

Same product: vllm
Same vendor: vllm-project
Same weakness: CWE-772

V. Comments for CVE-2026-94625

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