CVE-2026-93355LiteLLM Weak JWT Authentication via Email-Based User Lookup
Updated under an hour ago ()
Does this affect you?
It affects BerriAI litellm. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.27%, higher than 18% of scored CVEs.
Do this next
Free account, 1 product
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.
- CVSS
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-1390
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.27% (percentile 18)
- Assigned by
- VulnCheck
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
BerriAI litellm berriai:litellm (from the name) | through 1.102.1; through f4308bc124eebc783dfc51790ce8db27ed21ae00 | CNA record |
References
- https://www.ox.security/blog/litellm-an-ordinary-login-token-can-become-someone-elses-admin-account/technical-description, exploit
- https://www.vulncheck.com/advisories/litellm-weak-jwt-authentication-via-email-based-user-lookupthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.