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CVE-2026-48038— joi: Uncaught RangeError on deeply nested input through recursive `link()` schemas

Quick assessment

Affected
hapijs joi
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

hapi.js joi是hapi.js组织的一款JavaScript对象模式验证库。 hapi.js joi 17.13.4之前版本和18.2.1之前版本存在异常处理不当漏洞，该漏洞源于未捕获的异常，可能导致拒绝服务攻击。

CVSS 5.3 · Medium EPSS 0.52% · P45

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 2

VendorProduct Version RangeStatus
hapijs joi < 17.13.4 affected
>= 18.0.0, < 18.2.1 affected
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I. Basic Information for CVE-2026-48038

Vulnerability Information
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Vulnerability Title
joi: Uncaught RangeError on deeply nested input through recursive `link()` schemas
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5
Vulnerability Title
hapi.js joi 异常处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
hapi.js joi是hapi.js组织的一款JavaScript对象模式验证库。 hapi.js joi 17.13.4之前版本和18.2.1之前版本存在异常处理不当漏洞，该漏洞源于未捕获的异常，可能导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
hapijs joi < 17.13.4 -

II. Public POCs for CVE-2026-48038

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III. Intelligence Information for CVE-2026-48038

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Patches & Fixes for CVE-2026-48038 (3)

Vendor Advisories for CVE-2026-48038 (1)

IV. Related Vulnerabilities

Same product: joi
Same vendor: hapijs
Same weakness: CWE-248