CVE-2026-94625
vLLM through 0.29.0 Resource Exhaustion via Ownerless Mooncake Transfer Placeholders
- State
- Published
- Severity
- 6.9 Medium
- Published
- Sep 21, 2026
- Updated
- Sep 23, 2026
- Reserved
- Sep 21, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | VulnCheck |
Weaknesses
- CWE-772 Missing Release of Resource after Effective Lifetime
Affected Products
| Product | Versions |
|---|---|
vllmvllm-project |
|
References
- Pull Request #51236issue-trackingpatch
- https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/distributed/kv_transfer/kv_connector/v1/mooncake/mooncake_connector.py#L1234-L1242technical-description
- https://github.com/vllm-project/vllmproduct
- VulnCheck Advisory: vLLM through 0.29.0 Resource Exhaustion via Ownerless Mooncake Transfer Placeholdersthird-party-advisory
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