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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-42203 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  GitHub, Inc.
CVSS-B 8.6 HIGH
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

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://access.redhat.com/security/cve/CVE-2026-42203 redhat-SADP
https://bugzilla.redhat.com/show_bug.cgi?id=2467917 redhat-SADP
https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable GitHub, Inc. Product  Release Notes 
https://github.com/BerriAI/litellm/security/advisories/GHSA-xqmj-j6mv-4862 GitHub, Inc. Mitigation  Patch  Vendor Advisory 
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42203.json redhat-SADP

Weakness Enumeration

CWE-ID CWE Name Source
CWE-94 Improper Control of Generation of Code ('Code Injection') redhat-SADP  
CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-42203
NVD Published Date:
05/08/2026
NVD Last Modified:
06/29/2026
Source:
GitHub, Inc.