{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-79749",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-08-25T14:08:18.109Z",
        "datePublished": "2026-08-31T17:54:45.423Z",
        "dateUpdated": "2026-08-31T18:48:57.445Z"
    },
    "containers": {
        "cna": {
            "title": "MCPHub: SSRF Guard Bypass via IPv6 Transition Addresses in URL Validation",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-918",
                            "lang": "en",
                            "description": "CWE-918: Server-Side Request Forgery (SSRF)",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 7.6,
                        "baseSeverity": "HIGH",
                        "vectorString": "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",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/samanhappy/mcphub/security/advisories/GHSA-pr4x-3pc7-2fhw",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/samanhappy/mcphub/security/advisories/GHSA-pr4x-3pc7-2fhw"
                },
                {
                    "name": "https://github.com/samanhappy/mcphub/pull/1069",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/samanhappy/mcphub/pull/1069"
                },
                {
                    "name": "https://github.com/samanhappy/mcphub/commit/2b10ae36112ce68deebf910b22505d44efcef552",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/samanhappy/mcphub/commit/2b10ae36112ce68deebf910b22505d44efcef552"
                },
                {
                    "name": "https://github.com/samanhappy/mcphub/releases/tag/v1.0.32",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/samanhappy/mcphub/releases/tag/v1.0.32"
                }
            ],
            "affected": [
                {
                    "vendor": "samanhappy",
                    "product": "mcphub",
                    "versions": [
                        {
                            "version": "< 1.0.32",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-31T17:54:45.423Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into separate endpoints with flexible routing strategies. Prior to version 1.0.32, MCPHub's SSRF guard in src/utils/ssrf.ts uses a custom isBlockedIpv6 function that only checks for loopback, link-local, unique-local, IPv4-mapped, and IPv4-compatible IPv6 addresses. IPv6 transition address families -- NAT64 (64:ff9b::/96), 6to4 (2002::/16), and Teredo (2001::/32) -- are not checked. An attacker who can specify a URL for an MCP server connection can encode a private IPv4 address inside one of these IPv6 forms to bypass the SSRF guard and reach internal infrastructure. This issue has been patched in version 1.0.32."
                }
            ],
            "source": {
                "advisory": "GHSA-pr4x-3pc7-2fhw",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/samanhappy/mcphub/security/advisories/GHSA-pr4x-3pc7-2fhw",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-31T18:48:33.754446Z",
                                "id": "CVE-2026-79749",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-08-31T18:48:57.445Z"
                }
            }
        ]
    }
}