| Component | LiteLLM |
| Severity | high (CVSS 8.8) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Published (NVD) | 2026-05-08 |
| Last modified | 2026-07-15 |
| Affected versions | litellm >= 1.80.5, < 1.83.7 |
| Fixed in | 1.83.7 |
| Weakness | CWE-1336CWE-94 |
| CISA KEV | not listed |
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.
What to do
- Upgrade LiteLLM to
1.83.7or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-42203
- https://github.com/BerriAI/litellm/security/advisories/GHSA-xqmj-j6mv-4862
- https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable
- https://access.redhat.com/security/cve/CVE-2026-42203
- https://bugzilla.redhat.com/show_bug.cgi?id=2467917
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42203.json
Read more
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