Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/hapijs/joi/security/advisories/GHSA-6h2x-m376-mqjq
- https://www.vulncheck.com/advisories/joi-before-17.13.7-and-18.2.6-redos-via-iso
FAQ
What is CVE-2026-92599?
CVE-2026-92599 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 regu...
How severe is CVE-2026-92599?
CVE-2026-92599 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-92599?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.