{
  "schema_version": "1.4.0",
  "id": "GHSA-xvg2-cgv6-6h7v",
  "modified": "2026-07-29T17:03:48Z",
  "published": "2026-07-29T17:03:48Z",
  "aliases": [],
  "summary": "netfoil: Incorrect block responses could lead to localhost traffic",
  "details": "### Summary\n`0.0.0.0` was used instead of NXDOMAIN for block responses. On Linux, which is the target platform for netfoil, the `0.0.0.0` is sent to localhost rather than just dropped.\n\n### Impact\nUnintended traffic could be sent to localhost. Impact depends on running services and firewall rules.",
  "severity": [
    {
      "type": "CVSS_V4",
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/tinfoil-factory/netfoil"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.4.0"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/tinfoil-factory/netfoil/security/advisories/GHSA-xvg2-cgv6-6h7v"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tinfoil-factory/netfoil/pull/33"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tinfoil-factory/netfoil/commit/891d3513c77999a9deef9f23506807d9653ee448"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/tinfoil-factory/netfoil"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tinfoil-factory/netfoil/releases/tag/v0.4.0"
    }
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-693"
    ],
    "severity": "HIGH",
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-29T17:03:48Z",
    "nvd_published_at": null
  }
}