CVE-2026-58404

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.

CVSS v3 6.8 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/gohugoio/hugo/commit/a00b5c72ac57afe26df6688ece3ca544a56df372	Patch
https://github.com/gohugoio/hugo/pull/15020	Issue Tracking
https://github.com/gohugoio/hugo/releases/tag/v0.163.1	Release Notes
https://github.com/gohugoio/hugo/security/advisories/GHSA-r46f-3rpw-hxrv	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:gohugo:hugo:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-07-06 20:16

Updated : 2026-07-08 03:05

NVD link : CVE-2026-58404

Mitre link : CVE-2026-58404

CVE.ORG link : CVE-2026-58404

JSON object : View

Products Affected

gohugo

hugo

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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