CVE-2025-32444 vLLM Vulnerable to Remote Code Execution via Mooncake Integration

What is CVE-2025-32444?

CVE-2025-32444 is a critical unsafe deserialization vulnerability in Vllm Vllm, published on 30 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

vLLM is a high-throughput and memory-efficient inference and serving engine for LLMs. Versions starting from 0.6.5 and prior to 0.8.5, having vLLM integration with mooncake, are vulnerable to remote code execution due to using pickle based serialization over unsecured ZeroMQ sockets. The vulnerable sockets were set to listen on all network interfaces, increasing the likelihood that an attacker is able to reach the vulnerable ZeroMQ sockets to carry out an attack. vLLM instances that do not make use of the mooncake integration are not vulnerable. This issue has been patched in version 0.8.5.

Weakness: CWE-502

Which versions are affected by CVE-2025-32444?

3 open source packages ship an affected version, including vllm. It affects 1 product.

Products include Vllm Vllm.

How do I fix CVE-2025-32444?

Upgrade vllm to 0.8.5 or later.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2025-32444 being exploited?

There is no known exploitation of CVE-2025-32444 in the wild and no public exploit code.

Other vulnerabilities in Vllm Vllm

• CVE-2026-22778 vLLM leaks a heap address when PIL throws an error Critical 9.8
• CVE-2025-47277 vLLM Allows Remote Code Execution via PyNcclPipe Communication Service Critical 9.8
• CVE-2024-11041 Remote Code Execution in vllm-project/vllm Critical 9.8
• CVE-2026-48746 vLLM: OpenAI auth bypass Critical 9.1
• CVE-2025-29783 vLLM Allows Remote Code Execution via Mooncake Integration Critical 9.1

All Vllm Vllm vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-hj4w-hm2g-p6w5, PYSEC-2025-42.