CVE-2026-118772
Full vulnerability record from the local CVENow database.
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.
View original CVE JSON
{
"id": "CVE-2026-118772",
"sourceIdentifier": "[email protected]",
"published": "2026-10-29T19:17:19.563",
"lastModified": "2026-10-29T19:17:19.563",
"vulnStatus": "Received",
"cveTags": [],
"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": [
{
"source": "[email protected]",
"affectedData": [
{
"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"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "CWE-1333"
}
]
}
],
"references": [
{
"url": "https://github.com/hapijs/joi/commit/03dc1d909818503b06240dadc81e9227ed2649cf",
"source": "[email protected]"
},
{
"url": "https://github.com/hapijs/joi/commit/807858d7480f5075b0610817e3e44230890fb18e",
"source": "[email protected]"
},
{
"url": "https://github.com/hapijs/joi/pull/3162",
"source": "[email protected]"
},
{
"url": "https://github.com/hapijs/joi/pull/3163",
"source": "[email protected]"
},
{
"url": "https://github.com/hapijs/joi/releases/tag/v17.13.9",
"source": "[email protected]"
},
{
"url": "https://github.com/hapijs/joi/releases/tag/v18.3.1",
"source": "[email protected]"
},
{
"url": "https://github.com/hapijs/joi/security/advisories/GHSA-4528-x5fx-h6hg",
"source": "[email protected]"
}
]
}