🛡️ CVE-2026-42203
🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-1336 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CWE CWE-1336
Public Exploit ✅ No
Source NVD
Published 2026-04-24
Updated 2026-06-15
Modified 2026-05-12
Fix URL N/A

Affected Packages

Software From version Fixed in
litellm 1.80.5 1.83.7
unknown — —

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