CVE-2025-47277: vLLM PyNcclPipe KV cache transfer exposed on all network interfaces

Summary

vLLM versions 0.6.5 through 0.8.4 are affected by CVE-2025-47277, but only when the PyNcclPipe KV cache transfer integration is used with the V0 engine. PyTorch's TCPStore listens on all interfaces by default, so the address passed via --kv-ip did not restrict exposure as intended, leaving the PyNcclPipe communication interface reachable beyond the private network.

Mitigation

Fixed in 0.8.5, which limits the TCPStore socket to the private interface configured via --kv-ip.

Affected packages in the Exposure Registry

Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.

• vllmPyPILLM dependency since 2023-08-25 · 15 tracked dependents

Topics

• Inference infrastructure

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