{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-58404",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-30T18:19:58.379Z",
        "datePublished": "2026-07-06T19:16:15.945Z",
        "dateUpdated": "2026-07-07T15:08:53.514Z"
    },
    "containers": {
        "cna": {
            "title": "Hugo security.http.urls deny rules bypassed by alternate IPv4 encodings",
            "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": "PASSIVE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "HIGH",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 4.6,
                        "baseSeverity": "MEDIUM",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/gohugoio/hugo/security/advisories/GHSA-r46f-3rpw-hxrv",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/gohugoio/hugo/security/advisories/GHSA-r46f-3rpw-hxrv"
                },
                {
                    "name": "https://github.com/gohugoio/hugo/pull/15020",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/gohugoio/hugo/pull/15020"
                },
                {
                    "name": "https://github.com/gohugoio/hugo/commit/a00b5c72ac57afe26df6688ece3ca544a56df372",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/gohugoio/hugo/commit/a00b5c72ac57afe26df6688ece3ca544a56df372"
                },
                {
                    "name": "https://github.com/gohugoio/hugo/releases/tag/v0.163.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/gohugoio/hugo/releases/tag/v0.163.1"
                }
            ],
            "affected": [
                {
                    "vendor": "gohugoio",
                    "product": "hugo",
                    "versions": [
                        {
                            "version": ">= v0.162.0, < v0.163.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-07-06T19:16:15.945Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Hugo is a static site generator. From v0.162.0 through v0.163.0, the default security.http.urls policy denies requests to loopback, internal, and cloud-metadata IPv4 literals, but the deny rule only matched dotted-decimal notation, so alternate IPv4 encodings of the same addresses, including integer, hex, or octal, passed the policy. When a template passes an untrusted or data-derived URL to resources.GetRemote and the host platform uses the cgo system resolver, these encodings resolve to the blocked address, allowing build-time server-side requests to loopback and internal services, including the cloud-metadata endpoint in hosted or CI builds; the same check is reused on redirects, so the gap also applies to each redirect hop. This issue is fixed in v0.163.1."
                }
            ],
            "source": {
                "advisory": "GHSA-r46f-3rpw-hxrv",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-07T15:08:15.371330Z",
                                "id": "CVE-2026-58404",
                                "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": "2026-07-07T15:08:53.514Z"
                }
            }
        ]
    }
}