CVE-2025-48942— vLLM DOS: Remotely kill vllm over http with invalid JSON schema
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I. Basic Information for CVE-2025-48942
Vulnerability Information
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Vulnerability Title
vLLM DOS: Remotely kill vllm over http with invalid JSON schema
Source: NVD (National Vulnerability Database)
Vulnerability Description
vLLM is an inference and serving engine for large language models (LLMs). In versions 0.8.0 up to but excluding 0.9.0, hitting the /v1/completions API with a invalid json_schema as a Guided Param kills the vllm server. This vulnerability is similar GHSA-9hcf-v7m4-6m2j/CVE-2025-48943, but for regex instead of a JSON schema. Version 0.9.0 fixes the issue.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未捕获的异常
Source: NVD (National Vulnerability Database)
Vulnerability Title
vLLM 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
vLLM是vLLM开源的一个适用于 LLM 的高吞吐量和内存高效推理和服务引擎。 vLLM 0.8.0至0.9.0之前版本存在安全漏洞，该漏洞源于使用无效json_schema调用/v1/completions API可能导致服务器崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| vllm-project | vllm | >= 0.8.0, < 0.9.0 | - |
II. Public POCs for CVE-2025-48942
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · vllm-project · 2025-05-30 · 4 CVEs total
| CVE-2025-48887 | 6.5 MEDIUM | vLLM has a Regular Expression Denial of Service (ReDoS, Exponential Complexity) Vulnerabil |
| CVE-2025-48944 | 6.5 MEDIUM | vLLM Tool Schema allows DoS via Malformed pattern and type Fields |
| CVE-2025-48943 | 6.5 MEDIUM | vLLM allows clients to crash the openai server with invalid regex |
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Same weakness: CWE-248
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V. Comments for CVE-2025-48942
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