BIT-golang-2025-47912

vendorUSosv

Insufficient validation of bracketed IPv6 hostnames in net/url

view advisory published 2025-11-06Licence: per source

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2025-47912US	—	0.47% (40th)	—	2025-10-29
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 wit…

references

External citations — patches, advisories, analysis.

http://www.openwall.com/lists/oss-security/2025/10/08/1DISCUSSION
https://go.dev/cl/709857FIX
https://go.dev/issue/75678REPORT
https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bIDISCUSSION
https://nvd.nist.gov/vuln/detail/CVE-2025-47912WEB
https://pkg.go.dev/vuln/GO-2025-4010ADVISORY

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