{"id":"GHSA-mvrp-3cvx-c325","aliases":[],"status":"published","title":"Zod denial of service vulnerability during email validation","description":"### 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","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","from":"ghsa"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1333"],"published":"2023-10-04T14:46:06Z","modified":"2023-10-04T14:46:06Z","fixes":[{"ecosystem":"npm","package":"express-zod-api","fixed_in":["10.0.0-beta1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"express-zod-api","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"10.0.0-beta1"}]}]},{"source":"osv","ecosystem":"npm","package":"express-zod-api","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"10.0.0-beta1"}]}]}],"references":[{"url":"https://github.com/RobinTail/express-zod-api/security/advisories/GHSA-mvrp-3cvx-c325","tags":["web"]},{"url":"https://github.com/colinhacks/zod/issues/2609","tags":["web"]},{"url":"https://github.com/colinhacks/zod/pull/2824","tags":["web"]},{"url":"https://github.com/advisories/GHSA-m95q-7qp3-xv42","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-mvrp-3cvx-c325"},{"url":"https://github.com/RobinTail/express-zod-api","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-mvrp-3cvx-c325","title":"Zod denial of service vulnerability during email validation","description":"### 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","status":"published","published":"2023-10-04T14:46:06Z","modified":"2023-10-04T14:46:06Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T14:37:07.641671Z"}],"osv":[{"id":"GHSA-mvrp-3cvx-c325","title":"Zod denial of service vulnerability during email validation","description":"### 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","status":"published","published":"2023-10-04T14:46:06Z","modified":"2023-10-04T14:46:06Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T15:46:52.170928Z"}]}}