---
id: CVE-2026-16150
title: A vulnerability was found in RobinHerbots Inputmask up to 5.0.9
summary: >-
  A vulnerability was found in RobinHerbots Inputmask up to 5.0.9. Affected by
  this issue is the function extendDefaults/extendDefinitions/extendAliases in
  the library lib/dependencyLibs/extend.js of the component Internal Deep Merge
  Helpe…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-94
  - CWE-1321
published: '2026-07-18'
updated: '2026-07-18'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-16150'
references:
  - url: 'https://github.com/RobinHerbots/Inputmask/'
    label: cna@vuldb.com
  - url: 'https://github.com/RobinHerbots/Inputmask/issues/2885'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-16150'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/856979'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/379909'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/379909/cti'
    label: cna@vuldb.com
tags:
  - nvd
ingestedAt: '2026-07-19T08:30:39.861Z'
epss: 0.00446
epssPercentile: 0.36106
---

## Overview

A vulnerability was found in RobinHerbots Inputmask up to 5.0.9. Affected by this issue is the function extendDefaults/extendDefinitions/extendAliases in the library lib/dependencyLibs/extend.js of the component Internal Deep Merge Helper. The manipulation results in improperly controlled modification of object prototype attributes. The attack may be performed from remote. The project was informed of the problem early through an issue report but has not responded yet.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.