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CVE-2026-42203— LiteLLM: Server-Side Template Injection in /prompts/test endpoint

EPSS 0.05% · P14
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I. Basic Information for CVE-2026-42203

Vulnerability Information
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Vulnerability Title
LiteLLM: Server-Side Template Injection in /prompts/test endpoint
Source: NVD (National Vulnerability Database)
Vulnerability Description
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From version 1.80.5 to before version 1.83.7, the POST /prompts/test endpoint accepted user-supplied prompt templates and rendered them without sandboxing. A crafted template could run arbitrary code inside the LiteLLM Proxy process. The endpoint only checks that the caller presents a valid proxy API key, so any authenticated user could reach it. Depending on how the proxy is deployed, this could expose secrets in the process environment (such as provider API keys or database credentials) and allow commands to be run on the host. This issue has been patched in version 1.83.7.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1336
Source: NVD (National Vulnerability Database)
Vulnerability Title
LiteLLM 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LiteLLM是Berri AI开源的一个应用程序。可以使用 OpenAI 格式调用所有 LLM API。 LiteLLM 1.80.5版本至1.83.7之前版本存在安全漏洞，该漏洞源于POST /prompts/test端点接受用户提供的提示模板且无沙箱渲染，可能导致特制模板在LiteLLM代理进程中运行任意代码，任何拥有有效代理API密钥的认证用户均可利用，可能暴露进程环境中的秘密并允许在主机上运行命令。
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

VendorProductAffected VersionsCPESubscribe
BerriAIlitellm >= 1.80.5, < 1.83.7 -

II. Public POCs for CVE-2026-42203

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III. Intelligence Information for CVE-2026-42203

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Same Patch Batch · BerriAI · 2026-05-08 · 3 CVEs total

CVE-2026-42271LiteLLM: Authenticated command execution via MCP stdio test endpoints
CVE-2026-42208LiteLLM: SQL injection in Proxy API key verification

IV. Related Vulnerabilities

Same product: litellm
Same vendor: BerriAI
Same weakness: CWE-1336

V. Comments for CVE-2026-42203

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