CVE catalog
CVE-2026-42203
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 templa
- Severity
- High · CVSS 8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.37% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | litellm | Not reported | 1.83.7 | fixed |
| PyPI | litellm | Not reported | 1.83.7 | fixed |
| PyPI | litellm | Not reported | 1.83.7 | fixed |
| Cpe | litellm | Not reported | 1.83.7 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | litellm | cpe | Not reported | 1.83.7 | Not reported | Not reported | Not reported |
| PyPI | litellm | PyPI | Not reported | 1.83.7 | Not reported | GHSA-XQMJ-J6MV-4862 | Not reported |
| PyPI | litellm | PyPI | Not reported | 1.83.7 | Not reported | PYSEC-2026-2602 | Not reported |
| Cpe | litellm | cpe | Not reported | 1.83.7 | Not reported | NVD-CVE-2026-42203 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://access.redhat.com/security/cve/CVE-2026-42203]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2467917]
- [https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable]
- [https://github.com/BerriAI/litellm/security/advisories/GHSA-xqmj-j6mv-4862]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-42203]
- [https://osv.dev/vulnerability/PYSEC-2026-2602]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42203.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1422.json]
[CERT-Bund public advisories] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]