SOURCE-LINKED INTELLIGENCE
GHSA-wc36-9694-f9rf: vLLM Denial of Service via the best_of parameter
A vulnerability was found in the ilab model serve component, where improper handling of the best_of parameter in the vllm JSON web API can lead to a Denial of Service (DoS). The API used for LLM-based sentence or chat completion accepts a best_of parameter to return the best completion from several options. When this parameter is set to a large value, the API does not handle timeouts or resource exhaustion properly, allowing an attacker to cause a DoS by consuming excessive system resources. This leads to the API becoming unresponsive, preventing legitimate users from accessing the service.
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- recordType
- vulnerability
- status
- active
- evidenceStatus
- reported
- region
- Global
Evidence & attribution
- OSV AI package advisories · 2024-09-17T18:33:26.000Z
- OSV AI package advisories · 2026-07-07T14:34:41.654Z
First collected: 2026-09-20T22:31:48.298Z. This is not the publication date.