CVE-2026-116176

High

Description

vLLM from 0.9.2 before 0.24.0 contains a server-side request forgery vulnerability that allows API callers to force outbound connections by embedding a decode address in the X-Request-Id header. Attackers can make a P2pNcclConnector prefill worker ZMQ-connect to an attacker host, leaking the NCCL unique_id and KV-cache tensors or blocking the worker.

SeverityHigh

CVSS8.2

Exploit probability—

ProductVllm

PublishedOct 25, 2026

First seenOct 25, 2026

Weakness typeCWE-918Server-side request forgery (SSRF)

How to fix

Update

vllm vllm0.24.0 or later

Vendor advisories

github.com/vllm-project/vllm/security/advisories/GHSA-vfp2-c8pq-v6h6

Affected products

Product	Affected versions	Fixed in
vllm vllm	0.9.2 ≤ v < 0.24.0	0.24.0

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