| Component | LiteLLM |
| Severity | high (CVSS 8.1) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| Published (NVD) | 2026-09-28 |
| Last modified | 2026-09-30 |
| Affected versions | not published yet, see the advisory |
| Fixed in | see the vendor advisory |
| Weakness | CWE-1390 |
| CISA KEV | not listed |
NVD description
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.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep LiteLLM off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-93355
- 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
Read more
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