Unrated severityNVD Advisory· Published Oct 29, 2025· Updated Nov 4, 2025

Insufficient validation of bracketed IPv6 hostnames in net/url

CVE-2025-47912

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.

Affected products

Go standard library/net/urlv5
Range: 0

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

go.dev/cl/709857mitre
go.dev/issue/75678mitre
groups.google.com/g/golang-announce/c/4Emdl2iQ_bImitre
pkg.go.dev/vuln/GO-2025-4010mitre

News mentions

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