High 8.8Published May 8, 2026

CVE-2026-42203LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format.

Updated under an hour ago (2026-10-19 10:00 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for litellm

Exploited in the last 30 days

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: 8.8 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-1336, CWE-94
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jul 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

litellm litellm litellm:litellm	from 1.80.5 before 1.83.7	NVD

References

https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stableproduct, release-notes
https://github.com/BerriAI/litellm/security/advisories/GHSA-xqmj-j6mv-4862mitigation, patch, vendor-advisory
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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.