CVE-2026-16150 RobinHerbots CVE debrief

Who should care

Users of RobinHerbots Inputmask up to version 5.0.9 should be aware of this vulnerability and take necessary precautions to secure their deployments, especially those with remote exposure. This involves reviewing system configurations, monitoring for suspicious activity, and applying patches or mitigations as soon as they are available.

Technical summary

The vulnerability is caused by a flaw in the Internal Deep Merge Helper component of RobinHerbots Inputmask. Specifically, the functions extendDefaults, extendDefinitions, and extendAliases in the lib/dependencyLibs/extend.js library do not properly control modification of object prototype attributes. This could allow an attacker to manipulate object properties, potentially leading to security issues. The vulnerability has a CVSS score of 5.3 and is considered to be of medium severity.

Defensive priority

Medium priority due to the CVSS score of 5.3 and the potential for remote exploitation. Organizations should prioritize patching or mitigating this vulnerability based on their risk assessment and exposure to the affected Inputmask versions.

Recommended defensive actions

• Inventory and check usage of affected Inputmask versions
• Apply vendor patches or updates when available
• Implement compensating controls to monitor and restrict usage of vulnerable Inputmask versions
• Monitor for and respond to potential exploitation attempts
• Review and update security policies to address vulnerability management for Inputmask
• Conduct a thorough risk assessment to identify and prioritize affected systems
• Establish a timeline for patching and remediation based on risk and impact

Evidence notes

The CVE record was published on 2026-07-18T20:17:29.947Z and has not been modified since then. The NVD entry is currently Received. Limited information is available about the actual impact and exploitation of this vulnerability. The vulnerability affects the Internal Deep Merge Helper component of RobinHerbots Inputmask, specifically the functions extendDefaults, extendDefinitions, and extendAliases in the lib/dependencyLibs/extend.js library. This allows for improperly controlled modification of object prototype attributes, which could be exploited remotely.

Official resources