GHSA-4528-X5FX-H6HG joi: quadratic-time split in `string().email({ multiple: true })` allows denial of service

Summary Joi.string.email multiple: true takes quadratic time to split a value that contains a long run of whitespace. One request with 100 KB of spaces blocks the Node.js event loop for several seconds, which causes a denial of service. Details When the multiple option is set, the email rule spli...