{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-27129",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-02-17T18:42:27.043Z",
        "datePublished": "2026-02-24T02:45:45.494Z",
        "dateUpdated": "2026-02-28T02:17:18.957Z"
    },
    "containers": {
        "cna": {
            "title": "Cloud Metadata SSRF Protection Bypass via IPv6 Resolution",
            "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": "NONE",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 5.7,
                        "baseSeverity": "MEDIUM",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/craftcms/cms/security/advisories/GHSA-v2gc-rm6g-wrw9",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/craftcms/cms/security/advisories/GHSA-v2gc-rm6g-wrw9"
                },
                {
                    "name": "https://github.com/craftcms/cms/security/advisories/GHSA-x27p-wfqw-hfcc",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/craftcms/cms/security/advisories/GHSA-x27p-wfqw-hfcc"
                },
                {
                    "name": "https://github.com/craftcms/cms/commit/2825388b4f32fb1c9bd709027a1a1fd192d709a3",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/craftcms/cms/commit/2825388b4f32fb1c9bd709027a1a1fd192d709a3"
                }
            ],
            "affected": [
                {
                    "vendor": "craftcms",
                    "product": "cms",
                    "versions": [
                        {
                            "version": ">= 4.5.0-RC1, < 4.16.19",
                            "status": "affected"
                        },
                        {
                            "version": ">= 5.0.0-RC1, < 5.8.23",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-02-24T02:45:45.494Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Craft is a content management system (CMS). In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, the SSRF validation in Craft CMS’s GraphQL Asset mutation uses `gethostbyname()`, which only resolves IPv4 addresses. When a hostname has only AAAA (IPv6) records, the function returns the hostname string itself, causing the blocklist comparison to always fail and completely bypassing SSRF protection. This is a bypass of the security fix for CVE-2025-68437. Exploitation requires GraphQL schema permissions for editing assets in the `<VolumeName>` volume and creating assets in the `<VolumeName>` volume. These permissions may be granted to authenticated users with appropriate GraphQL schema access and/or Public Schema (if misconfigured with write permissions). Versions 4.16.19 and 5.8.23 patch the issue."
                }
            ],
            "source": {
                "advisory": "GHSA-v2gc-rm6g-wrw9",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-02-28T02:16:52.966432Z",
                                "id": "CVE-2026-27129",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "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": "2026-02-28T02:17:18.957Z"
                }
            }
        ]
    }
}