{"cve":"CVE-2026-42203","nvd":{"published":"2026-05-08T04:16:19.450","modified":"2026-10-26T20:10:00.160","status":"Modified","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.","cvss_v4":{"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","score":8.6},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-1336","CWE-94"],"references":["https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable","https://github.com/BerriAI/litellm/security/advisories/GHSA-xqmj-j6mv-4862","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"],"products":["litellm:litellm"],"source":"nvd","synced_at":"2026-10-26T20:34:58.897451322+00:00"},"epss":{"cve":"CVE-2026-42203","score":0.00373,"percentile":0.31052,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-xqmj-j6mv-4862","url":"https://osv.dev/vulnerability/GHSA-xqmj-j6mv-4862","summary":"LiteLLM: Server-Side Template Injection in /prompts/test endpoint","modified":"2026-09-10T03:50:45.007056853Z","packages":[{"ecosystem":"PyPI","name":"litellm","purl":"pkg:pypi/litellm","ranges":[">=1.80.5 <1.83.7"],"fixed":["1.83.7"]}]},{"id":"PYSEC-2026-2602","url":"https://osv.dev/vulnerability/PYSEC-2026-2602","summary":"LiteLLM: Server-Side Template Injection in /prompts/test endpoint","modified":"2026-07-13T16:32:04.546343789Z","packages":[{"ecosystem":"PyPI","name":"litellm","purl":"pkg:pypi/litellm","ranges":[">=1.80.5 <1.83.7"],"fixed":["1.83.7"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}