{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "express-zod-api"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "10.0.0-beta1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-1333"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-10-04T14:46:06Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\n\nAPI servers running `express-zod-api` having:\n\n- version of `express-zod-api` below `10.0.0-beta1`,\n- and using the following (or similar) validation schema in its implementation: `z.string().email()`,\n\nare vulnerable to a DoS attack due to: \n\n- Inefficient Regular Expression Complexity in `zod` versions up to `3.22.2`,\n- depending on `zod`.\n\n### Patches\n\nThe patched version of `zod` fixing the vulnerability is `3.22.3`.\n\nHowever, it\u0027s highly recommended to upgrade `express-zod-api` to at least version `10.0.0`, which does not depend on `zod` strictly and directly, but requires its installation as a peer dependency instead, enabling you to install the patched `zod` version yourself.\n\n### Workarounds\n\nWhen it\u0027s not possible to upgrade your dependencies, consider the following replacement in your implementation:\n\n```diff\n- z.string().email()\n+ z.string().regex(\n+   /^(?!\\.)(?!.*\\.\\.)([A-Z0-9_+-\\.]*)[A-Z0-9_+-]@([A-Z0-9][A-Z0-9\\-]*\\.)+[A-Z]{2,}$/i\n+ )\n```\n\nThis regular expression is taken from the suggested patch of `zod`.\n\n### References\n\n- Original issue: https://github.com/colinhacks/zod/issues/2609\n- The patch: https://github.com/colinhacks/zod/pull/2824\n- Entry in database: https://nvd.nist.gov/vuln/detail/CVE-2023-4316\n- Enumeration: https://cwe.mitre.org/data/definitions/1333.html\n- Parent advisory: https://github.com/advisories/GHSA-m95q-7qp3-xv42\n- Changelog entry for `express-zod-api` version `10.0.0-beta1`: https://github.com/RobinTail/express-zod-api/blob/master/CHANGELOG.md#v1000-beta1",
  "id": "GHSA-mvrp-3cvx-c325",
  "modified": "2023-10-04T14:46:06Z",
  "published": "2023-10-04T14:46:06Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/RobinTail/express-zod-api/security/advisories/GHSA-mvrp-3cvx-c325"
    },
    {
      "type": "WEB",
      "url": "https://github.com/colinhacks/zod/issues/2609"
    },
    {
      "type": "WEB",
      "url": "https://github.com/colinhacks/zod/pull/2824"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/RobinTail/express-zod-api"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-m95q-7qp3-xv42"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Zod denial of service vulnerability during email validation"
}