CVE-2025-47912

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.

CVSS 3.1

5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS

0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-25)

Published

2025-10-29

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

Affected

• golang:go

Packages (OSV)

References

• https://go.dev/cl/709857
• https://go.dev/issue/75678
• https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI
• https://pkg.go.dev/vuln/GO-2025-4010
• http://www.openwall.com/lists/oss-security/2025/10/08/1

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