{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-59822",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-07-07T15:00:50.978Z",
        "datePublished": "2026-07-08T19:32:18.611Z",
        "dateUpdated": "2026-09-03T03:56:05.174Z"
    },
    "containers": {
        "cna": {
            "title": "LiteLLM: MCP Authentication Bypass via OAuth2 Passthrough Fallback",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-287",
                            "lang": "en",
                            "description": "CWE-287: Improper Authentication",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-306",
                            "lang": "en",
                            "description": "CWE-306: Missing Authentication for Critical Function",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "LOW",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH",
                        "vectorString": "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",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/BerriAI/litellm/security/advisories/GHSA-7488-6r32-c95q",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/BerriAI/litellm/security/advisories/GHSA-7488-6r32-c95q"
                },
                {
                    "name": "https://github.com/BerriAI/litellm/pull/26463",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/BerriAI/litellm/pull/26463"
                },
                {
                    "name": "https://github.com/BerriAI/litellm/commit/73869f0faf7d11ee21adcb5f91b8c33a340b6c2c",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/BerriAI/litellm/commit/73869f0faf7d11ee21adcb5f91b8c33a340b6c2c"
                },
                {
                    "name": "https://github.com/BerriAI/litellm/releases/tag/v1.84.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/BerriAI/litellm/releases/tag/v1.84.0"
                }
            ],
            "affected": [
                {
                    "vendor": "BerriAI",
                    "product": "litellm",
                    "versions": [
                        {
                            "version": "< 1.84.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-07-08T19:32:18.611Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "source": {
                "advisory": "GHSA-7488-6r32-c95q",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-02T00:00:00+00:00",
                                "options": [
                                    {
                                        "Exploitation": "active"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3",
                                "id": "CVE-2026-59822"
                            }
                        }
                    },
                    {
                        "other": {
                            "type": "kev",
                            "content": {
                                "dateAdded": "2026-09-02",
                                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-59822"
                            }
                        }
                    }
                ],
                "references": [
                    {
                        "url": "https://www.wiz.io/blog/ai-infrastructure-honeypot",
                        "tags": [
                            "third-party-advisory"
                        ]
                    },
                    {
                        "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-59822",
                        "tags": [
                            "government-resource"
                        ]
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-03T03:56:05.174Z"
                },
                "timeline": [
                    {
                        "time": "2026-09-02T00:00:00.000Z",
                        "lang": "en",
                        "value": "CVE-2026-59822 added to CISA KEV"
                    }
                ]
            }
        ]
    }
}