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CVE-2026-34756vLLM Affected by Unauthenticated OOM Denial of Service via Unbounded `n` Parameter in OpenAI API Server

vllm-project vllm; Red Hat Red Hat AI Inference Server 3.2; Red Hat Red Hat AI Inference Server 3.4; Red Hat Red Hat Enterprise Linux AI 3.4 Yayım: (7 ay önce)

Açıklama

vLLM is an inference and serving engine for large language models (LLMs). From 0.1.0 to before 0.19.0, a Denial of Service vulnerability exists in the vLLM OpenAI-compatible API server. Due to the lack of an upper bound validation on the n parameter in the ChatCompletionRequest and CompletionRequest Pydantic models, an unauthenticated attacker can send a single HTTP request with an astronomically large n value. This completely blocks the Python asyncio event loop and causes immediate Out-Of-Memory crashes by allocating millions of request object copies in the heap before the request even reaches the scheduling queue. This vulnerability is fixed in 0.19.0.

Zayıflık türü (CWE): CWE-770CWE-1284

Veri: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Bilgiler kaynaktaki haliyle, İngilizce yayımlanır.

Etkilenen ürünler ve sürümler

ÜreticiÜrünSürümler
ai inference server 3.2 —
ai inference server 3.4 —
enterprise linux ai 3.4 —
Red Hat Red Hat AI Inference Server all versions
Red Hat Red Hat AI Inference Server 3.2 all versions
Red Hat Red Hat AI Inference Server 3.4 all versions
Red Hat Red Hat Enterprise Linux AI 3.4 all versions
Red Hat Red Hat OpenShift AI (RHOAI) all versions
vllm-project vllm >= 0.1.0, < 0.19.0

Kaynaklar ve yamalar

CPE eşleşmeleri (NVD) (1)
  • cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:* ≥ 0.1.0 < 0.19.0

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