CVE-2026-58404

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Source
https://cve.org/CVERecord?id=CVE-2026-58404
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-58404.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-58404
Aliases
Downstream
Published
2026-07-06T19:16:15.945Z
Modified
2026-08-12T03:30:40.050406524Z
Severity
  • 4.6 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
Hugo security.http.urls deny rules bypassed by alternate IPv4 encodings
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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58404.json",
    "cwe_ids": [
        "CWE-918"
    ]
}
References

Affected packages

Git / github.com/gohugoio/hugo

Affected ranges

Type
GIT
Repo
https://github.com/gohugoio/hugo
Events
Introduced
076dfe13d0f789e3d9586b192f8f7f3329c26990
Fixed
2a4fd58818ffdf45bbb2a97ab119bb4c46cd93f0
Fixed
a00b5c72ac57afe26df6688ece3ca544a56df372
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0.162.0"
        },
        {
            "fixed": "0.163.1"
        }
    ],
    "cpe": "cpe:2.3:a:gohugo:hugo:*:*:*:*:*:*:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.162.0
v0.162.1
v0.163.0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-58404.json"