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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-04-30 · updated 2026-06-17
• Weakness: CWE-502

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.

Affected products

• vllm-project vllm: from 0.6.5 before 0.8.5 — fixed in 0.8.5

How to fix

Upgrade to a fixed version: vllm-project vllm 0.8.5. Check the vendor advisory for mitigations.

References

• https://github.com/vllm-project/vllm/blob/32b14baf8a1f7195ca09484de3008063569b43c5/vllm/distributed/kv_transfer/kv_pipe/mooncake_pipe.py#L179
• https://github.com/vllm-project/vllm/commit/a5450f11c95847cf51a17207af9a3ca5ab569b2c
• https://github.com/vllm-project/vllm/security/advisories/GHSA-hj4w-hm2g-p6w5
• https://github.com/vllm-project/vllm/security/advisories/GHSA-x3m8-f7g5-qhm7

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