Vulnerability · Published Sep 16, 2026 · Assigned by VulnCheck

CVE-2026-92599Joi before 17.13.7 and 18.2.6 ReDoS via isoDate

High 7.5

In plain English

A high-severity regular-expression denial of service in joi from hapijs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.6%top 52.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

joi (npm package `joi`, hapi.js) versions >=17.2.0 <17.13.7 and >=18.0.0 <18.2.6 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	joi	17.13.7	GHSA-6h2x-m376-mqjq
npm	joi	18.2.6	GHSA-6h2x-m376-mqjq

Affected products (as reported)

Vendor	Product	Versions
hapijs	joi	17.2.0 – before 17.13.7
hapijs	joi	18.0.0 – before 18.2.6

Weakness: CWE-1333 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-6h2x-m376-mqjq) vendor-advisory
VulnCheck Advisory: Joi before 17.13.7 and 18.2.6 ReDoS via isoDate third-party-advisory