---
id: CVE-2026-93355
title: >-
  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
  authentic…
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
  authentic…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-1390
vendor: BerriAI
product: litellm
affected:
  - litellm <= 1.102.1
  - litellm <= f4308bc124eebc783dfc51790ce8db27ed21ae00
published: '2026-09-28'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T20:17:11.547'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93355'
references:
  - url: >-
      https://www.ox.security/blog/litellm-an-ordinary-login-token-can-become-someone-elses-admin-account/
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/litellm-weak-jwt-authentication-via-email-based-user-lookup
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-28T20:20:05.661Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.