id: GO-2025-4010
modules:
    - module: std
      versions:
        - fixed: 1.24.8
        - introduced: 1.25.0
        - fixed: 1.25.2
      vulnerable_at: 1.25.1
      packages:
        - package: net/url
          symbols:
            - parseHost
          derived_symbols:
            - JoinPath
            - Parse
            - ParseRequestURI
            - URL.Parse
            - URL.UnmarshalBinary
summary: Insufficient validation of bracketed IPv6 hostnames in net/url
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.
cves:
    - CVE-2025-47912
credits:
    - Enze Wang, Jingcheng Yang and Zehui Miao of Tsinghua University
references:
    - report: https://go.dev/issue/75678
    - fix: https://go.dev/cl/709857
    - web: https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI
cve_metadata:
    id: CVE-2025-47912
    cwe: 'CWE-1286: Improper Validation of Syntactic Correctness of Input'
source:
    id: go-security-team
    created: 2025-10-28T18:25:39.603085-07:00
review_status: REVIEWED