CVE-2026-42208

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From version 1.81.16 to before version 1.83.7, a database query used during proxy API key checks mixed the caller-supplied key value into the query text instead of passing it as a separate parameter. An unauthenticated attacker could send a specially crafted Authorization header to any LLM API route (for example POST /chat/completions) and reach this query through the proxy's error-handling path. An attacker could read data from the proxy's database and may be able to modify it, leading to unauthorised access to the proxy and the credentials it manages. This issue has been patched in version 1.83.7.

• CWE-89
• CWE-89

• https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stableProduct, Release Notes
• https://github.com/BerriAI/litellm/security/advisories/GHSA-r75f-5x8p-qvmcMitigation, Patch, Vendor Advisory
• https://access.redhat.com/security/cve/CVE-2026-42208Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2463965Mitigation, Third Party Advisory
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42208.jsonThird Party Advisory
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-42208US Government Resource

Published

May 8, 2026

Last Modified

Jul 15, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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