{"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": "2026-07-06T19:16:15.945Z"}, "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"}}}}

{}

{}

{}

{}