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{"affected": [{"affectedData": [{"product": "joi", "vendor": "hapijs", "versions": [{"status": "affected", "version": ">= 16.0.0, <= 17.1.1"}, {"status": "affected", "version": ">= 18.0.0, < 18.3.1"}]}, {"product": "joi", "vendor": "@hapi", "versions": [{"status": "affected", "version": ">= 16.0.0, <= 17.1.1"}]}], "source": "security-advisories@github.com"}], "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."}], "id": "CVE-2026-118772", "lastModified": "2026-11-04T02:17:15.813", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-118772", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-04T01:33:26.811594Z", "version": "2.0.3"}}]}, "published": "2026-10-29T19:17:19.563", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/hapijs/joi/commit/03dc1d909818503b06240dadc81e9227ed2649cf"}, {"source": "security-advisories@github.com", "url": "https://github.com/hapijs/joi/commit/807858d7480f5075b0610817e3e44230890fb18e"}, {"source": "security-advisories@github.com", "url": "https://github.com/hapijs/joi/pull/3162"}, {"source": "security-advisories@github.com", "url": "https://github.com/hapijs/joi/pull/3163"}, {"source": "security-advisories@github.com", "url": "https://github.com/hapijs/joi/releases/tag/v17.13.9"}, {"source": "security-advisories@github.com", "url": "https://github.com/hapijs/joi/releases/tag/v18.3.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/hapijs/joi/security/advisories/GHSA-4528-x5fx-h6hg"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/hapijs/joi/security/advisories/GHSA-4528-x5fx-h6hg"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1333"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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