{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-48782",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-05-22T20:18:20.365Z",
        "datePublished": "2026-06-16T22:49:26.750Z",
        "dateUpdated": "2026-06-17T14:22:48.236Z"
    },
    "containers": {
        "cna": {
            "title": "pydantic-ai: SSRF blocklist bypass via IPv4-compatible, SIIT/IVI, and local NAT64 IPv6 addresses (incomplete fix of CVE-2026-46678)",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-918",
                            "lang": "en",
                            "description": "CWE-918: Server-Side Request Forgery (SSRF)",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 6.8,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "CHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-cg7w-rg45-pc59",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-cg7w-rg45-pc59"
                },
                {
                    "name": "https://github.com/pydantic/pydantic-ai/pull/5596",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/pydantic/pydantic-ai/pull/5596"
                },
                {
                    "name": "https://github.com/pydantic/pydantic-ai/commit/1add06179ba4de259f7ab977620b697b7209f7e4",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/pydantic/pydantic-ai/commit/1add06179ba4de259f7ab977620b697b7209f7e4"
                },
                {
                    "name": "https://github.com/pydantic/pydantic-ai/releases/tag/v1.102.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/pydantic/pydantic-ai/releases/tag/v1.102.0"
                }
            ],
            "affected": [
                {
                    "vendor": "pydantic",
                    "product": "pydantic-ai",
                    "versions": [
                        {
                            "version": ">= 1.56.0, < 1.102.0",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2.0.0b1, < 2.0.0b3",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "pydantic",
                    "product": "pydantic-ai-slim",
                    "versions": [
                        {
                            "version": ">= 2.0.0b1, < 2.0.0b3",
                            "status": "affected"
                        },
                        {
                            "version": ">= 1.56.0, < 1.102.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-06-16T22:49:26.750Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. In versions 1.56.0 through 1.101.0, 2.0.0b1, and 2.0.0b2, the cloud-metadata blocklist could be bypassed by encoding the metadata IP in an IPv6 transition form that the previous fix, CVE-2026-46678, did not decode, exposing cloud IAM short-term credentials. The previous remediation decoded only IPv4-mapped IPv6, 6to4, and the NAT64 well-known prefix, so the metadata guarantee did not hold for the remaining transition forms: IPv4-compatible IPv6 (::a.b.c.d), the NAT64 RFC 8215 local-use prefix (64:ff9b:1::/48), operator-chosen NAT64 prefixes, and ISATAP. The IPv6 wrapper is then delivered to the underlying IPv4 metadata endpoint. This occurs when an application using Pydantic AI opts a URL into force_download='allow-local' (which disables the default block on private/internal IPs) and runs on a network that actually routes the affected IPv6 transition forms: NAT64-configured networks (IPv6-only or dual-stack-with-NAT64 deployments, including some Kubernetes setups) for the NAT64 variants, or networks with an ISATAP tunnel for ISATAP. A standard dual-stack cloud VM or container does not route these forms and is not affected in practice. The IPv4-compatible and Teredo variants are deprecated and addressed as defense-in-depth. This is an incomplete fix of GHSA-cqp8-fcvh-x7r3 / CVE-2026-46678 (itself a follow-up to CVE-2026-25580). This issue has been fixed in version 2.0.0b3."
                }
            ],
            "source": {
                "advisory": "GHSA-cg7w-rg45-pc59",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-06-17T14:22:37.373304Z",
                                "id": "CVE-2026-48782",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-06-17T14:22:48.236Z"
                }
            }
        ]
    }
}