CVE-2026-93355

Summary

LiteLLM contains a weak authentication vulnerability that allows an attacker holding a valid JWT from the configured identity provider to authenticate as any existing user by exploiting an email-based fallback lookup in the JWT authentication flow without verifying the email_verified claim. Attackers can present a token with an unverified email address matching a victim's account to inherit the victim's role, including proxy_admin privileges, and permanently overwrite the victim's stored identity binding to retain persistent unauthorized access to administrative endpoints exposing API keys and user management.

Affected Software

Weaknesses

• CWE-1390: Weak Authentication

References

• https://www.ox.security/blog/litellm-an-ordinary-login-token-can-become-someone-elses-admin-account/
• https://www.vulncheck.com/advisories/litellm-weak-jwt-authentication-via-email-based-user-lookup

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