CVE-2026-94625CWE-772

CVE-2026-94625

Medium · published September 22, 2026

CVSS v3.1
5.3
EPSS
1%
Percentile
43.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
6.9 · 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
EPSS
0.00521 · 43.4th percentile
Weakness
CWE-772 · Missing Release of Resource after Effective Lifetime
Published
2026-09-22T02:17Z
Affected products (1)
ProductVersionsFixed in
vllm/vllm≤ 0.29.0—
References (4)
https://github.com/vllm-project/vllm · [email protected]https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/distributed/kv_transfer/kv_connector/v1/mooncake/mooncake_connector.py#L1234-L1242 · [email protected]https://github.com/vllm-project/vllm/pull/51236 · [email protected]https://www.vulncheck.com/advisories/vllm-through-0.29.0-resource-exhaustion-via-ownerless-mooncake-transfer-placeholders · [email protected]
EPSS history
Timeline
  • 23 SEP 03:49Z
    EPSS moved — → 0%
    epss
  • 21 SEP 22:04Z
    vLLM through 0.29.0 Resource Exhaustion via Ownerless Mooncake Transfer Placeholders
    cvelistv5