hapijs joi up to 17.13.6/18.0.0-18.2.5 isoDate Joi.string.isoDate redos

Summaryinfo

A vulnerability was found in hapijs joi up to 17.13.6/18.0.0-18.2.5. It has been rated as problematic. Affected is the function Joi.string.isoDate of the component isoDate. This manipulation causes redos. This vulnerability appears as CVE-2026-92599. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in hapijs joi up to 17.13.6/18.0.0-18.2.5 and classified as problematic. Affected by this vulnerability is the function Joi.string.isoDate of the component isoDate. The manipulation with an unknown input leads to a redos vulnerability. The CWE definition for the vulnerability is CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. As an impact it is known to affect availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-92599 since 09/16/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1449.003 for this issue.

Upgrading to version 17.13.7 or 18.2.6 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-81299). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• hapijs

Name

• joi

Version

• 17.13.0
• 17.13.1
• 17.13.2
• 17.13.3
• 17.13.4
• 17.13.5
• 17.13.6
• 18.0.0-18.2.0
• 18.0.0-18.2.1
• 18.0.0-18.2.2
• 18.0.0-18.2.3
• 18.0.0-18.2.4
• 18.0.0-18.2.5

Website

• Product: https://github.com/hapijs/joi/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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