{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.102.1"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "d09bbae1c6df463e425558f60d460437193635da"
            }
          ],
          "repo": "https://github.com/berriai/litellm",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-1390"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93355.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "last_affected": "f4308bc124eebc783dfc51790ce8db27ed21ae00"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "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.",
  "id": "CVE-2026-93355",
  "modified": "2026-10-01T03:30:38.178591950Z",
  "published": "2026-09-28T19:26:01.155Z",
  "references": [
    {
      "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": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/litellm-weak-jwt-authentication-via-email-based-user-lookup"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/BerriAI/litellm"
    },
    {
      "type": "EVIDENCE",
      "url": "https://www.ox.security/blog/litellm-an-ordinary-login-token-can-become-someone-elses-admin-account/"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "LiteLLM Weak JWT Authentication via Email-Based User Lookup"
}