{"id":"CVE-2026-58404","revision":null,"records":[{"revision":"7498c921baf348f495b5e4f6793ce968","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-58404","aliases":[],"title":"Hugo security.http.urls deny rules bypassed by alternate IPv4 encodings","description":"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.","state":0,"publishedAt":"2026-07-06T19:16:15.945+00:00","modifiedAt":"2026-07-07T15:08:53.514+00:00","affected":[{"ecosystem":"Vendor product","name":"hugo","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"gohugoio\",\n                    \"product\": \"hugo\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= v0.162.0, < v0.163.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":4.6,"severity":"MEDIUM"}],"references":["https://github.com/gohugoio/hugo/security/advisories/GHSA-r46f-3rpw-hxrv","https://github.com/gohugoio/hugo/pull/15020","https://github.com/gohugoio/hugo/commit/a00b5c72ac57afe26df6688ece3ca544a56df372","https://github.com/gohugoio/hugo/releases/tag/v0.163.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-58404","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-58404","identifiers":["CVE-2026-58404"]},"retained":false,"historicalAffected":[]},{"revision":"42aed0397eea45bdab0c3c83d707f933","observedAt":"2026-11-07T13:23:43.204+00:00","statement":{"source":"euvd","id":"EUVD-2026-41918","aliases":["CVE-2026-58404"],"title":"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 alter…","description":"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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"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","score":4.6,"severity":null}],"references":["https://github.com/gohugoio/hugo/security/advisories/GHSA-r46f-3rpw-hxrv","https://github.com/gohugoio/hugo/pull/15020","https://github.com/gohugoio/hugo/commit/a00b5c72ac57afe26df6688ece3ca544a56df372","https://github.com/gohugoio/hugo/releases/tag/v0.163.1"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-41918","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jul 6, 2026, 7:16:15 PM","dateUpdated":"Jul 7, 2026, 3:08:53 PM"},"relatedAdvisories":[{"id":"RHSA-2026:36862","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","vulnerabilityIds":["CVE-2026-50133","CVE-2026-58402","CVE-2026-58403","CVE-2026-58404"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-41918","identifiers":["EUVD-2026-41918","CVE-2026-58404"]},"retained":false,"historicalAffected":[]},{"revision":"6ae372392d14446a98fe64d41bfbede8","observedAt":"2026-10-27T15:15:28.354+00:00","statement":{"source":"nvd","id":"CVE-2026-58404","aliases":[],"title":"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 alter…","description":"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.","state":0,"publishedAt":"2026-07-06T20:16:38.307+00:00","modifiedAt":"2026-10-25T20:10:00.147+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":4.6,"severity":"MEDIUM"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N","score":6.8,"severity":"MEDIUM"}],"references":["https://github.com/gohugoio/hugo/commit/a00b5c72ac57afe26df6688ece3ca544a56df372","https://github.com/gohugoio/hugo/pull/15020","https://github.com/gohugoio/hugo/releases/tag/v0.163.1","https://github.com/gohugoio/hugo/security/advisories/GHSA-r46f-3rpw-hxrv"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-58404","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-918"],"productCriteria":["cpe:2.3:a:gohugo:hugo:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-07-06T20:16:38.307","lastModified":"2026-10-25T20:10:00.147"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-58404","identifiers":["CVE-2026-58404"]},"retained":false,"historicalAffected":[]},{"revision":"d21903eb3b44489d896d10d2c57620f3","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-r46f-3rpw-hxrv","aliases":["CVE-2026-58404","GO-2026-5606"],"title":"Hugo: security.http.urls deny rules bypassed by alternate IPv4 encodings (SSRF)","description":"### Impact\n\n  The default `security.http.urls` policy denies requests to loopback, internal,\n  and cloud-metadata IPv4 literals (e.g. `http://127.0.0.1/`,\n  `http://169.254.169.254/`). The deny rule only matched dotted-decimal notation,\n  so alternate IPv4 encodings of the same addresses — integer, hex, or octal,\n  which contain no dot — passed the policy:\n\n  - `http://2130706433/` → `127.0.0.1`\n  - `http://2852039166/` → `169.254.169.254` (cloud metadata)\n  - `http://0x7f000001/`, `http://017700000001/`, `http://0/`\n\n  When a template passes an untrusted or data-derived URL to\n  `resources.GetRemote` and the host platform uses the\n  cgo system resolver, these encodings resolve to the blocked address — allowing\n  build-time server-side requests to loopback and internal services, including the\n  cloud-metadata endpoint in hosted/CI builds. The same check is reused on\n  redirects, so the gap also applies to each redirect hop.\n\n  This affects sites that rely on `security.http.urls` as a security boundary\n  while fetching attacker-influenced remote URLs; it does not affect sites that\n  fully trust the URLs they fetch.\n\n  ### Patches\n\n  Fixed in **v0.163.1**. Integer/hex/octal IPv4 hosts are now canonicalized to\n  dotted-decimal before the policy is applied, so every encoding of an address is\n  treated alike. No configuration change is required.\n\n  ### Workarounds\n\n  Avoid passing untrusted URLs to `resources.GetRemote`, or\n  tighten `security.http.urls` to an explicit allow-list of trusted hosts.\n\n  ### Affected versions\n\n  v0.162.0 – v0.163.0 (patched in v0.163.1).","state":0,"publishedAt":"2026-06-19T19:18:14+00:00","modifiedAt":"2026-07-24T19:11:46.3947051+00:00","affected":[{"ecosystem":"Go","name":"github.com/gohugoio/hugo","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.162.0"},{"kind":"fixed","version":"0.163.1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/gohugoio/hugo/security/advisories/GHSA-r46f-3rpw-hxrv","https://github.com/gohugoio/hugo"],"sourceUrl":"https://github.com/advisories/GHSA-r46f-3rpw-hxrv","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-r46f-3rpw-hxrv","identifiers":["GHSA-r46f-3rpw-hxrv","CVE-2026-58404","GO-2026-5606"]},"retained":false,"historicalAffected":[]},{"revision":"e350f58c1ef94abe862826d20dd7cde4","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-5606","aliases":["CVE-2026-58404","GHSA-r46f-3rpw-hxrv"],"title":"Hugo: security.http.urls deny rules bypassed by alternate IPv4 encodings (SSRF) in github.com/gohugoio/hugo","description":"Hugo: security.http.urls deny rules bypassed by alternate IPv4 encodings (SSRF) in github.com/gohugoio/hugo","state":0,"publishedAt":"2026-07-24T18:35:55+00:00","modifiedAt":"2026-07-24T19:11:46.3947051+00:00","affected":[{"ecosystem":"Go","name":"github.com/gohugoio/hugo","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.162.0"},{"kind":"fixed","version":"0.163.1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/gohugoio/hugo/security/advisories/GHSA-r46f-3rpw-hxrv","https://github.com/gohugoio/hugo/commit/a00b5c72ac57afe26df6688ece3ca544a56df372"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-5606","license":"OSV · upstream source license applies","key":"osv:GO-2026-5606","identifiers":["GO-2026-5606","CVE-2026-58404","GHSA-r46f-3rpw-hxrv"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-07T20:07:23.8593986+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-07T20:07:23.8593986+00:00","lastSuccessAt":"2026-11-07T20:07:24.014368+00:00","error":null,"lastVerifiedAt":"2026-11-07T20:07:24.014369+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-bb5c9d5a08063ef076042e33dd72a7d0ffa4c4487efdcf3106e29ba55ec2ad57-aac6631b84e101279eb6b1c3835f52bf7b26c50f4d25bc0fb35977235593f4a7","complete":true,"records":420943,"lastAttemptAt":"2026-11-07T20:52:31.8394812+00:00","lastSuccessAt":"2026-11-07T20:07:23.0712879+00:00","error":null,"lastVerifiedAt":"2026-11-07T20:07:23.1739993+00:00","snapshotPublishedAt":"2026-11-07T19:18:33+00:00","importing":true,"stagedRecords":500,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-c5a2504558b549559b8658a653596391","complete":true,"records":13633,"lastAttemptAt":"2026-11-07T20:19:26.3099435+00:00","lastSuccessAt":"2026-11-07T20:19:26.304+00:00","error":null,"lastVerifiedAt":"2026-11-07T20:19:26.304+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-07T20:07:23.8593986+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-07T20:07:23.8593986+00:00","lastSuccessAt":"2026-11-07T20:07:24.0152025+00:00","error":null,"lastVerifiedAt":"2026-11-07T20:07:24.0152028+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-191690d52ba04a91b1a2749fa6191ceb","complete":true,"records":13645,"lastAttemptAt":"2026-11-07T20:07:42.8841875+00:00","lastSuccessAt":"2026-11-07T20:07:42.881+00:00","error":null,"lastVerifiedAt":"2026-11-07T20:07:42.881+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-0eb4d6dde62dffacd040ad992d4fd5a65cd7d0dc5f5f4cfa8b41967fc6f9ca5f","complete":true,"records":9914,"lastAttemptAt":"2026-11-07T20:07:23.800032+00:00","lastSuccessAt":"2026-11-06T20:10:36.6450506+00:00","error":null,"lastVerifiedAt":"2026-11-07T20:07:23.800032+00:00","snapshotPublishedAt":"2026-11-06T20:02:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-07T20:07:23.2420378+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-07T20:07:23.2420378+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-335633e78a15c9cde10a6025895b5617717087fb945489ae7e15d377bacf34a9","complete":true,"records":3055,"lastAttemptAt":"2026-11-07T20:07:23.8227715+00:00","lastSuccessAt":"2026-11-06T16:03:00.7615789+00:00","error":null,"lastVerifiedAt":"2026-11-07T20:07:23.8227715+00:00","snapshotPublishedAt":"2026-11-06T16:02:48+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-40ad6183a951565ace1520a9b4d631e1d0bfb1d4bf7c5574c375032559f3ff53","complete":true,"records":231292,"lastAttemptAt":"2026-11-07T20:07:23.4659623+00:00","lastSuccessAt":"2026-11-07T10:29:00.4821259+00:00","error":null,"lastVerifiedAt":"2026-11-07T20:07:23.4659623+00:00","snapshotPublishedAt":"2026-11-07T09:32:47+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}