GCD AI RADAR
incidents/AIR-2024-0166

CVE-2024-8939: vLLM Denial of Service via best_of parameter

Attack on AI2 Disclosed vulnerabilityInfrastructure vulnerability

An improper handling vulnerability in the vLLM JSON web API allows attackers to cause a denial of service by supplying a large best_of parameter. The API becomes unresponsive due to excessive resource exhaustion.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

Details

type
Attack on AI
An AI model, agent or AI-powered product was the thing exploited, abused or leaked.
categories
  • Infrastructure vulnerability
    CVEs and advisories in AI frameworks, inference servers, MCP servers, AI developer tools and hosting stacks.
owasp llm top 10
mitre atlas
no technique for these categories
Both rows are derived from the type and categories (OWASP 2025 edition, ATLAS release 2026.09), not classified per record. How
severity
2 · Disclosed vulnerability
CVE or vendor advisory, patched or patchable, no confirmed exploitation.
targets
Framework / tooling
products
vLLM
incident date
17 Sep 2024
first reported
17 Sep 2024
origin
GitHub Advisory Database
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
classifier confidence
0.95 · published at or above 0.80; see the methodology
tags
CVE-2024-8939 · denial-of-service · vllm
record
created 2026-10-18 07:00Z · updated 2026-10-18 10:04Z · json

Sources · 2

  1. 2024-09-17
    CVE-2024-8939: vLLM Denial of Service via the best_of parameter
    GitHub Advisory Database · github.com/advisories/GHSA-wc36-9694-f9rf
  2. 2024-09-17
    CVE-2024-8939: A vulnerability was found in the ilab model serve component, where improper handling of the best_of parameter in the vllm JSON…
    NVD · nvd.nist.gov/vuln/detail/CVE-2024-8939

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