{"id":"CVE-2026-93355","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-93355","summary":"LiteLLM Weak JWT Authentication via Email-Based User Lookup","details":"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.","published":"2026-09-28T19:26:01.155Z","modified":"2026-09-29T11:46:29.656391581Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"PACKAGE","url":"https://github.com/BerriAI/litellm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93355.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93355"},{"type":"EVIDENCE","url":"https://www.ox.security/blog/litellm-an-ordinary-login-token-can-become-someone-elses-admin-account/"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/litellm-weak-jwt-authentication-via-email-based-user-lookup"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-29T11:46:29.656391581Z"}}