{"id":"GHSA-mvrp-3cvx-c325","summary":"Zod denial of service vulnerability during email validation","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's 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's 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","modified":"2023-10-04T14:46:06Z","published":"2023-10-04T14:46:06Z","database_specific":{"cwe_ids":["CWE-1333"],"github_reviewed_at":"2023-10-04T14:46:06Z","github_reviewed":true,"nvd_published_at":null,"severity":"HIGH"},"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"}],"affected":[{"package":{"name":"express-zod-api","ecosystem":"npm","purl":"pkg:npm/express-zod-api"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"10.0.0-beta1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/10/GHSA-mvrp-3cvx-c325/GHSA-mvrp-3cvx-c325.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}