{"id":"GHSA-mrx9-2rrp-rhpx","summary":"Duplicate Advisory: joi: Quadratic regular-expression backtracking in `Joi.string().isoDate()`","details":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-6h2x-m376-mqjq. This link is maintained to preserve external references.\n\n## Original Description\njoi (npm package `joi`, hapi.js) versions \u003e=17.2.0 \u003c17.13.7 and \u003e=18.0.0 \u003c18.2.6 are vulnerable to regular expression denial of service in the `Joi.string().isoDate()` validation rule. One of the regular expressions the rule applies to the input is unanchored, so a valid ISO date followed by a long run of fractional-second digits causes the regex engine to restart its search from every position in the string, yielding time proportional to the square of the input length (about 1.4 s for 64 KB of digits and about 22 s for 256 KB). A remote attacker who can supply a string to an isoDate validation can stall the application with a single request. Fixed in 17.13.7 and 18.2.6; as a workaround, cap the length of the string before it reaches joi.","modified":"2026-10-05T23:45:07.572540444Z","published":"2026-09-17T00:31:27Z","withdrawn":"2026-10-05T23:30:50Z","database_specific":{"cwe_ids":["CWE-1333"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-10-05T23:30:50Z","nvd_published_at":"2026-09-16T22:18:30Z"},"references":[{"type":"WEB","url":"https://github.com/hapijs/joi/security/advisories/GHSA-6h2x-m376-mqjq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92599"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/joi-before-17.13.7-and-18.2.6-redos-via-isodate"}],"affected":[{"package":{"name":"joi","ecosystem":"npm","purl":"pkg:npm/joi"},"ranges":[{"type":"SEMVER","events":[{"introduced":"18.0.0"}]}],"database_specific":{"last_known_affected_version_range":"\u003c 18.2.6","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-mrx9-2rrp-rhpx/GHSA-mrx9-2rrp-rhpx.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}