{"id":"CVE-2026-118772","state":"PUBLISHED","title":"joi: quadratic-time split in `string().email({ multiple: true })` allows denial of service","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.","publishedAt":"2026-10-29T18:13:33.771Z","updatedAt":"2026-10-29T18:13:33.771Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["hapijs joi","@hapi joi"],"affected":[{"vendor":"hapijs","product":"joi","versions":[{"version":">= 16.0.0, <= 17.1.1","status":"affected"},{"version":">= 18.0.0, < 18.3.1","status":"affected"}]},{"vendor":"@hapi","product":"joi","versions":[{"version":">= 16.0.0, <= 17.1.1","status":"affected"}]}],"references":["https://github.com/hapijs/joi/security/advisories/GHSA-4528-x5fx-h6hg","https://github.com/hapijs/joi/pull/3162","https://github.com/hapijs/joi/pull/3163","https://github.com/hapijs/joi/commit/03dc1d909818503b06240dadc81e9227ed2649cf","https://github.com/hapijs/joi/commit/807858d7480f5075b0610817e3e44230890fb18e","https://github.com/hapijs/joi/releases/tag/v17.13.9","https://github.com/hapijs/joi/releases/tag/v18.3.1"],"weaknesses":["CWE-1333"],"ingestedAt":"2026-10-29T20:10:52.580Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/118xxx/CVE-2026-118772.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-118772","state":"PUBLISHED","datePublished":"2026-10-29T18:13:33.771Z","dateUpdated":"2026-10-29T18:13:33.771Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-28T19:20:05.018Z"},"containers":{"cna":{"title":"joi: quadratic-time split in `string().email({ multiple: true })` allows denial of service","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"hapijs","product":"joi","versions":[{"version":">= 16.0.0, <= 17.1.1","status":"affected"},{"version":">= 18.0.0, < 18.3.1","status":"affected"}]},{"vendor":"@hapi","product":"joi","versions":[{"version":">= 16.0.0, <= 17.1.1","status":"affected"}]}],"references":[{"url":"https://github.com/hapijs/joi/security/advisories/GHSA-4528-x5fx-h6hg","name":"https://github.com/hapijs/joi/security/advisories/GHSA-4528-x5fx-h6hg","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/hapijs/joi/pull/3162","name":"https://github.com/hapijs/joi/pull/3162","tags":["x_refsource_MISC"]},{"url":"https://github.com/hapijs/joi/pull/3163","name":"https://github.com/hapijs/joi/pull/3163","tags":["x_refsource_MISC"]},{"url":"https://github.com/hapijs/joi/commit/03dc1d909818503b06240dadc81e9227ed2649cf","name":"https://github.com/hapijs/joi/commit/03dc1d909818503b06240dadc81e9227ed2649cf","tags":["x_refsource_MISC"]},{"url":"https://github.com/hapijs/joi/commit/807858d7480f5075b0610817e3e44230890fb18e","name":"https://github.com/hapijs/joi/commit/807858d7480f5075b0610817e3e44230890fb18e","tags":["x_refsource_MISC"]},{"url":"https://github.com/hapijs/joi/releases/tag/v17.13.9","name":"https://github.com/hapijs/joi/releases/tag/v17.13.9","tags":["x_refsource_MISC"]},{"url":"https://github.com/hapijs/joi/releases/tag/v18.3.1","name":"https://github.com/hapijs/joi/releases/tag/v18.3.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1333","lang":"en","description":"CWE-1333: Inefficient Regular Expression Complexity","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-29T18:13:33.771Z"},"source":{"advisory":"GHSA-4528-x5fx-h6hg","discovery":"UNKNOWN"}}}}}