CVE-2025-47912

Insufficient validation of bracketed IPv6 hostnames in net/url

Published Oct 29, 2025 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
The Parse function permits values other than IPv6 addresses to be included in square brackets within the host component of a URL. RFC 3986 permits IPv6 addresses to be included within the host component, enclosed within square brackets. For example: "http://[::1]/". IPv4 addresses and hostnames must not appear within square brackets. Parse did not enforce this requirement.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Golang go
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
Vendors & Products Golang go
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Golang
Golang net
Vendors & Products Golang
Golang net
Type Values Removed Values Added
Description The Parse function permits values other than IPv6 addresses to be included in square brackets within the host component of a URL. RFC 3986 permits IPv6 addresses to be included within the host component, enclosed within square brackets. For example: "http://[::1]/". IPv4 addresses and hostnames must not appear within square brackets. Parse did not enforce this requirement.
Title Insufficient validation of bracketed IPv6 hostnames in net/url
References

Sources

Status
PUBLISHED
Assigner
Go
Published
Updated
Nov 4, 2025, 9:10 PM
Reserved
May 13, 2025, 11:31 PM
Status
Analyzed
Published
Oct 29, 2025, 11:16 PM
Modified
Oct 8, 2026, 10:10 AM
Severity
Moderate
Public date
Oct 29, 2025, 10:10 PM