{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:litellm:litellm:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.84.0"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e1fc955464bf493c15aef08f98e0e22bdf24d4cf"
            },
            {
              "fixed": "73869f0faf7d11ee21adcb5f91b8c33a340b6c2c"
            }
          ],
          "repo": "https://github.com/berriai/litellm",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-7488-6r32-c95q"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-287",
      "CWE-306"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59822.json"
  },
  "details": "LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.84.0, LiteLLM's MCP Streamable HTTP endpoint allowed an unauthenticated attacker to use a fabricated Authorization header to trigger an OAuth2 passthrough fallback path that replaced failed LiteLLM key validation with an empty UserAPIKeyAuth() object, allowing requests to reach MCP tooling without a valid LiteLLM key. This issue is fixed in version 1.84.0.",
  "id": "CVE-2026-59822",
  "modified": "2026-07-16T03:31:12.925917650Z",
  "published": "2026-07-08T19:32:18.611Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/BerriAI/litellm/releases/tag/v1.84.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/BerriAI/litellm/security/advisories/GHSA-7488-6r32-c95q"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59822.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59822"
    },
    {
      "type": "FIX",
      "url": "https://github.com/BerriAI/litellm/commit/73869f0faf7d11ee21adcb5f91b8c33a340b6c2c"
    },
    {
      "type": "FIX",
      "url": "https://github.com/BerriAI/litellm/pull/26463"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "LiteLLM: MCP Authentication Bypass via OAuth2 Passthrough Fallback"
}