CVE-2026-48038

Medium

Description

joi is a schema description language and data validator for JavaScript. Prior to 17.13.4 and 18.2.1, denial of service is possible via an untrapped exception in services validating user-supplied JSON or object input with recursive link() schemas. When validate() is called without try/catch in a request handler, deeply nested input can trigger an unhandled RangeError and potentially crash the process; lower-impact paths using validateAsync() or try/catch produce a RangeError instead of a structured ValidationError. This issue is fixed in versions 17.13.4 and 18.2.1.

SeverityMedium

CVSS5.3

Exploit probability—

ProductJoi

PublishedJul 14, 2026

First seenJul 14, 2026

Weakness typeCWE-248CWE-248

How to fix

Update

joi18.2.1, 17.13.4 or later

Affected products

Product	Affected versions	Fixed in
joinpm	18.0.0 ≤ v < 18.2.1, v < 17.13.4	18.2.1, 17.13.4

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