Zod denial of service vulnerability during email validation

Summary

### Impact

API servers running `express-zod-api` having:

- version of `express-zod-api` below `10.0.0-beta1`, - and using the following (or similar) validation schema in its implementation: `z.string().email()`,

are vulnerable to a DoS attack due to:

- Inefficient Regular Expression Complexity in `zod` versions up to `3.22.2`, - depending on `zod`.

### Patches

The patched version of `zod` fixing the vulnerability is `3.22.3`.

However, 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.

### Workarounds

When it's not possible to upgrade your dependencies, consider the following replacement in your implementation:

```diff - z.string().email() + z.string().regex( + /^(?!\.)(?!.*\.\.)([A-Z0-9_+-\.]*)[A-Z0-9_+-]@([A-Z0-9][A-Z0-9\-]*\.)+[A-Z]{2,}$/i + ) ```

This regular expression is taken from the suggested patch of `zod`.

### References

- Original issue: https://github.com/colinhacks/zod/issues/2609 - The patch: https://github.com/colinhacks/zod/pull/2824 - Entry in database: https://nvd.nist.gov/vuln/detail/CVE-2023-4316 - Enumeration: https://cwe.mitre.org/data/definitions/1333.html - Parent advisory: https://github.com/advisories/GHSA-m95q-7qp3-xv42 - Changelog entry for `express-zod-api` version `10.0.0-beta1`: https://github.com/RobinTail/express-zod-api/blob/master/CHANGELOG.md#v1000-beta1