CVE-2025-47912

MEDIUM5.3

Insufficient validation of bracketed IPv6 hostnames in net/url

Published Oct 29, 2025

Modified 4 months ago

Details

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.

References

WEB

http://www.openwall.com/lists/oss-security/2025/10/08/1

WEB

https://go.dev/cl/709857

WEB

https://go.dev/issue/75678

WEB

https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI

WEB

https://pkg.go.dev/vuln/GO-2025-4010

ADVISORY