Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-93355

CVE-2026-93355HIGH

BerriAI litellm — LiteLLM Weak JWT Authentication via Email-Based User Lookup

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   P   L   N   H   H   N    7.6   .0027   17.9     —

AFFECTED
  Product  Versions     Fixed
  litellm  unspecified  —

TIMELINE
  Sep 17  Reserved by VulnCheck
  Sep 28  EXPLOIT PUBLISHED — CVE-2026-93355 (BerriAI litellm). Public exploit reference added.
  Sep 28  Published (CNA: VulnCheck)
  Sep 29  EXPLOIT PUBLISHED — CVE-2026-93355 (BerriAI litellm). Public exploit reference added.
  Oct 1   EXPLOIT PUBLISHED — CVE-2026-93355 (BerriAI litellm). Public exploit reference added.

CWE-1390 · CNA: VulnCheck · CVSS v4.0 · 2 references · NVD status: Awaiting Analysis

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.

Lifecycle

Complete event history — 5 events, chronological
Date	Event	Detail
September 17, 2026	Reserved	Reserved by VulnCheck
September 28, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-93355 (BerriAI litellm). Public exploit reference added.
September 28, 2026	Published	Published (CNA: VulnCheck)
September 29, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-93355 (BerriAI litellm). Public exploit reference added.
October 1, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-93355 (BerriAI litellm). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
BerriAI	litellm	—	—	—

Weaknesses

CWE-1390

References (2)

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-lookup [third-party-advisory]

Authoritative record: CVE-2026-93355 at cve.org

Vendors: berriai

Weaknesses: CWE-1390

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-93355 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.