GCD AI RADAR
incidents/AIR-2025-0327

CVE-2025-48956: vLLM API Denial of Service via Large HTTP Headers

Attack on AI2 Disclosed vulnerabilityInfrastructure vulnerability

An unauthenticated denial of service vulnerability in vLLM occurs when processing excessively large HTTP request headers, leading to server memory exhaustion. Vendor updates are available to resolve the problem.

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
21 Aug 2025
first reported
21 Aug 2025
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-2025-48956 · dos
record
created 2026-10-18 07:00Z · updated 2026-10-18 10:04Z · json

Sources · 2

  1. 2025-08-21
    CVE-2025-48956: vllm API endpoints vulnerable to Denial of Service Attacks
    GitHub Advisory Database · github.com/advisories/GHSA-rxc4-3w6r-4v47
  2. 2025-08-21
    CVE-2025-48956: vLLM is an inference and serving engine for large language models (LLMs).
    NVD · nvd.nist.gov/vuln/detail/CVE-2025-48956

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