{"id":"CVE-2026-118772","published":"2026-10-29T19:17:19.563","lastModified":"2026-10-29T19:17:19.563","description":"joi is a schema description language and data validator for JavaScript. From 17.1.1 until 17.13.9 and 18.3.1, the Joi.string().email({ multiple: true }) rule uses a separator regular expression whose leading whitespace quantifier is retried at every position in a long whitespace run that contains no separator, causing quadratic work during String.prototype.split. The behavior applies to the default separator and every custom separator. Applications that validate attacker-controlled values with the multiple option and no effective prior length limit can have the Node.js event loop blocked for seconds by one request, preventing other work. A .max() rule is not sufficient when abortEarly: false allows the email rule to run after the maximum-length check fails. This vulnerability is fixed in versions 17.13.9 and 18.3.1.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-1333"],"vendors":[],"products":[],"references":[{"url":"https://github.com/hapijs/joi/commit/03dc1d909818503b06240dadc81e9227ed2649cf","tags":[]},{"url":"https://github.com/hapijs/joi/commit/807858d7480f5075b0610817e3e44230890fb18e","tags":[]},{"url":"https://github.com/hapijs/joi/pull/3162","tags":[]},{"url":"https://github.com/hapijs/joi/pull/3163","tags":[]},{"url":"https://github.com/hapijs/joi/releases/tag/v17.13.9","tags":[]},{"url":"https://github.com/hapijs/joi/releases/tag/v18.3.1","tags":[]},{"url":"https://github.com/hapijs/joi/security/advisories/GHSA-4528-x5fx-h6hg","tags":[]}],"exploitRefs":[{"url":"https://github.com/hapijs/joi/commit/03dc1d909818503b06240dadc81e9227ed2649cf","tags":[]},{"url":"https://github.com/hapijs/joi/commit/807858d7480f5075b0610817e3e44230890fb18e","tags":[]},{"url":"https://github.com/hapijs/joi/pull/3162","tags":[]},{"url":"https://github.com/hapijs/joi/pull/3163","tags":[]},{"url":"https://github.com/hapijs/joi/releases/tag/v17.13.9","tags":[]},{"url":"https://github.com/hapijs/joi/releases/tag/v18.3.1","tags":[]},{"url":"https://github.com/hapijs/joi/security/advisories/GHSA-4528-x5fx-h6hg","tags":[]}],"hasPoc":true,"ai":null}