ubuntu-cve-2026-58404
Vulnerability from osv_ubuntu
Published
2026-07-06 20:16
Modified
2026-07-06 20:16
Summary
Details

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.

Severity
4.6 (Medium)
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
6.8 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-spf13-hugo-dev",
            "binary_version": "0.15+git20160206.203.ed23711-1"
          },
          {
            "binary_name": "hugo",
            "binary_version": "0.15+git20160206.203.ed23711-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "hugo",
        "purl": "pkg:deb/ubuntu/hugo@0.15+git20160206.203.ed23711-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.15+git20160109.147.dd1d655-1",
        "0.15+git20160109.147.dd1d655-2",
        "0.15+git20160128.179.5def6d9-1",
        "0.15+git20160206.203.ed23711-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "golang-github-gohugoio-hugo-dev",
            "binary_version": "0.40.1-1"
          },
          {
            "binary_name": "hugo",
            "binary_version": "0.40.1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "hugo",
        "purl": "pkg:deb/ubuntu/hugo@0.40.1-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.25.1-2",
        "0.26-1",
        "0.35-1",
        "0.37.1-1",
        "0.38-1",
        "0.39-1",
        "0.40-1",
        "0.40.1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hugo",
            "binary_version": "0.68.3-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "hugo",
        "purl": "pkg:deb/ubuntu/hugo@0.68.3-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.57.2-1",
        "0.58.3-1",
        "0.59.1-1.1",
        "0.68.3-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hugo",
            "binary_version": "0.92.2-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "hugo",
        "purl": "pkg:deb/ubuntu/hugo@0.92.2-1ubuntu0.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.80.0-6",
        "0.89.4-2",
        "0.90.0-1",
        "0.90.1-1",
        "0.91.0-1",
        "0.91.2-1",
        "0.92.0-1",
        "0.92.1-1build1",
        "0.92.2-1",
        "0.92.2-1ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hugo",
            "binary_version": "0.123.7-1ubuntu0.3+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "hugo",
        "purl": "pkg:deb/ubuntu/hugo@0.123.7-1ubuntu0.3+esm2?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.113.0-3",
        "0.119.0-2",
        "0.120.3-1",
        "0.120.4-1",
        "0.121.2-1",
        "0.122.0-1",
        "0.123.7-1build1",
        "0.123.7-1ubuntu0.1",
        "0.123.7-1ubuntu0.2",
        "0.123.7-1ubuntu0.2+esm1",
        "0.123.7-1ubuntu0.3",
        "0.123.7-1ubuntu0.3+esm1",
        "0.123.7-1ubuntu0.3+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hugo",
            "binary_version": "0.131.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "hugo",
        "purl": "pkg:deb/ubuntu/hugo@0.131.0-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.131.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hugo",
            "binary_version": "0.154.5-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "hugo",
        "purl": "pkg:deb/ubuntu/hugo@0.154.5-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.131.0-1",
        "0.152.2-1",
        "0.153.1-3",
        "0.153.2-1",
        "0.154.2-2",
        "0.154.3-1",
        "0.154.5-1"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2026-58404",
  "modified": "2026-07-06T20:16:00Z",
  "published": "2026-07-06T20:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-58404"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-58404"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/gohugoio/hugo/security/advisories/GHSA-r46f-3rpw-hxrv"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/gohugoio/hugo/pull/15020"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/gohugoio/hugo/commit/a00b5c72ac57afe26df6688ece3ca544a56df372"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/gohugoio/hugo/releases/tag/v0.163.1"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-58404"
  ]
}



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