{
  "schema_version": "1.3.1",
  "id": "GO-2025-3503",
  "modified": "0001-01-01T00:00:00Z",
  "published": "0001-01-01T00:00:00Z",
  "aliases": [
    "CVE-2025-22870"
  ],
  "summary": "HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net",
  "details": "Matching of hosts against proxy patterns can improperly treat an IPv6 zone ID as a hostname component. For example, when the NO_PROXY environment variable is set to \"*.example.com\", a request to \"[::1%25.example.com]:80` will incorrectly match and not be proxied.",
  "affected": [
    {
      "package": {
        "name": "golang.org/x/net",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.36.0"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "golang.org/x/net/http/httpproxy",
            "symbols": [
              "config.useProxy",
              "domainMatch.match"
            ]
          },
          {
            "path": "golang.org/x/net/proxy",
            "symbols": [
              "Dial",
              "FromEnvironment",
              "FromEnvironmentUsing",
              "PerHost.AddFromString",
              "PerHost.Dial",
              "PerHost.DialContext",
              "PerHost.dialerForRequest"
            ]
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "FIX",
      "url": "https://go.dev/cl/654697"
    },
    {
      "type": "REPORT",
      "url": "https://go.dev/issue/71984"
    }
  ],
  "credits": [
    {
      "name": "Juho Forsén of Mattermost"
    }
  ],
  "database_specific": {
    "url": "https://pkg.go.dev/vuln/GO-2025-3503",
    "review_status": "REVIEWED"
  }
}