GHSA-QXP5-GWG8-XV66

Vulnerability from github – Published: 2025-03-12 22:06 – Updated: 2026-04-24 20:36
VLAI
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.

Severity
4.4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "golang.org/x/net"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.36.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-22870"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-115",
      "CWE-20"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-03-12T22:06:40Z",
    "nvd_published_at": "2025-03-12T19:15:38Z",
    "severity": "MODERATE"
  },
  "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.",
  "id": "GHSA-qxp5-gwg8-xv66",
  "modified": "2026-04-24T20:36:12Z",
  "published": "2025-03-12T22:06:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22870"
    },
    {
      "type": "PACKAGE",
      "url": "https://go-review.googlesource.com/q/project:net"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/cl/654697"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/issue/71984"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/4t3lzH3I0eI/m/b42ImqrBAQAJ"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2025-3503"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20250509-0007"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/03/07/2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net"
}


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Nomenclature

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