# CVE-2026-94625 — vllm-project vllm

> As of 2026-09-21, CVE-2026-94625 is a MEDIUM-severity vulnerability in vllm-project vllm, CVSS v3.1 5.3, EPSS 0.3% (23.0th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-94625 as of 2026-09-21; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-21

## What is CVE-2026-94625?

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 classifies CVE-2026-94625 under weakness class [CWE-772](https://cwe.mitre.org/data/definitions/772.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 14 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 5.3 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **CVSS v4.0 base score:** 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 (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 23.0% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-21

## Is CVE-2026-94625 being exploited?

It currently carries a trending score of 35 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [vllm-project](https://intel.threadlinqs.com/vendors/vllm-project): vllm

## How to fix CVE-2026-94625

No vendor patch reference has been recorded for CVE-2026-94625 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-94625

No threat campaign in the Threadlinqs corpus currently references CVE-2026-94625, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-09-23. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com — issue tracking](https://github.com/vllm-project/vllm/pull/51236)

**Technical analysis**

- [github.com — technical description](https://github.com/vllm-project/vllm/blob/v0.29.0/vllm/distributed/kv_transfer/kv_connector/v1/mooncake/mooncake_connector.py#L1234-L1242)

**Third-party advisory**

- [vulncheck.com — third party advisory](https://www.vulncheck.com/advisories/vllm-through-0.29.0-resource-exhaustion-via-ownerless-mooncake-transfer-placeholders)

**Issue tracking and product pages**

- [github.com — product](https://github.com/vllm-project/vllm)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-94625
Full detection coverage and IOCs for threats exploiting CVE-2026-94625 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp