CVE-2026-92599 hapijs CVE debrief

Who should care

Defenders and developers using the Joi library in their applications should assess their exposure and prioritize verification and remediation efforts. This includes reviewing and updating affected systems and applications to ensure they are using a secure version of the Joi library. Additionally, defenders should monitor for potential exploitation attempts and adjust defensive measures accordingly.

Why it matters

Defenders should care about CVE-2026-92599 because it can cause application stalls or denial of service via a regular expression denial of service in the Joi library, affecting system availability and user experience. Relevant roles include developers and defenders using the Joi library, who should assess exposure and prioritize verification and remediation efforts. The corpus supports the potential for application stalls, but evidence of exploitation or specific victims is limited.

• Potential application stalls or denial of service due to excessive resource consumption.
• Need for verification of affected systems and applications to ensure they are using a secure version of the Joi library.
• Possible impact on system availability and user experience due to application stalls.

Technical summary

The Joi library is vulnerable to a regular expression denial of service in the Joi.string().isoDate() validation rule. A remote attacker can supply a string to an isoDate validation, causing the application to stall. This issue arises from an unanchored regular expression that can cause the application to consume excessive resources, leading to a denial of service. The vulnerability affects Joi versions >=17.2.0 <17.13.7 and >=18.0.0 <18.2.6. Fixed versions are 17.13.7 and 18.2.6. As a workaround, defenders can cap the length of the string before it reaches joi.

Defensive priority

Defenders should prioritize verifying and applying the available fixes (17.13.7 and 18.2.6) or workarounds (capping string length) to prevent potential application stalls.

Recommended defensive actions

• Verify and apply available fixes (17.13.7 and 18.2.6) or workarounds (capping string length) to prevent potential application stalls.
• Review and update affected systems and applications to ensure they are using a secure version of the Joi library.
• Monitor for potential exploitation attempts and adjust defensive measures accordingly.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including affected versions and fixed versions (17.13.7 and 18.2.6). The corpus does not establish evidence of exploitation or specific victims, but it is essential to verify affected systems and applications to ensure they are using a secure version of the Joi library. Limited evidence suggests that capping the length of the string before it reaches joi can serve as a workaround. Further verification is necessary to confirm the extent of the vulnerability and its in

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.