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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.

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Affected products

3116

Patches

Vulnerability mechanics

References

4

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