CVE-2026-42203

8.8 HIGH
Published: May 08, 2026 Modified: May 13, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable
Source: security-advisories@github.com
Product Release Notes
https://github.com/BerriAI/litellm/security/advisories/GHSA-xqmj-j6mv-4862
Source: security-advisories@github.com
Mitigation Patch Vendor Advisory

2 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.8 / 10.0
EPSS (Exploit Probability)
0.3%
23th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

litellm