Incorrect parsing of IPv6 host literals in net/url

{
  "id": "e67f128fd9a0cb72b79ce6328a513f5a028572ad02ea0a699128ffc5aa1ee17c",
  "url": "https://osv.dev/vulnerability/GO-2026-4601",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Incorrect parsing of IPv6 host literals in net/url",
    "summary": "url.Parse insufficiently validated the host/authority component and accepted some invalid URLs.",
    "evidence": "osv:GO-2026-4601",
    "products": [
      {
        "name": {
          "value": "stdlib",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.25.8",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "1.26.1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "GO-2026-4601",
      "aliases": [
        "BIT-golang-2026-25679",
        "CVE-2026-25679",
        "GO-2026-4601"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.25.8"
                },
                {
                  "introduced": "1.26.0-0"
                },
                {
                  "fixed": "1.26.1"
                }
              ]
            }
          ],
          "package": {
            "name": "stdlib",
            "purl": "pkg:golang/stdlib",
            "ecosystem": "Go"
          },
          "database_specific": {
            "source": "https://vuln.go.dev/ID/GO-2026-4601.json"
          },
          "ecosystem_specific": {
            "imports": [
              {
                "path": "net/url",
                "symbols": [
                  "JoinPath",
                  "Parse",
                  "ParseRequestURI",
                  "URL.Parse",
                  "URL.UnmarshalBinary",
                  "parseHost"
                ]
              }
            ]
          }
        }
      ],
      "modified": "2026-10-16T10:42:06.560940732Z",
      "provider": "osv",
      "references": [
        "https://go.dev/cl/752180",
        "https://go.dev/issue/77578",
        "https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk"
      ],
      "provider_metadata": {
        "url": "https://pkg.go.dev/vuln/GO-2026-4601",
        "review_status": "REVIEWED"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-25679",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 340599,
  "published_at": "2026-03-06T21:03:42+00:00"
}