CVE-2026-16150
MediumCVSS 6.3Exploitation Probability (EPSS)
Low risk17th percentile - higher than 17% of all known CVEs
Summary
A vulnerability was found in Inputmask up to version 5.0.9, involving uncontrolled modification of object prototype attributes in the extendDefaults/extendDefinitions/extendAliases functions. The issue resides in lib/dependencyLibs/extend.js and can be exploited remotely.
Risk Assessment
The organization is at risk of prototype pollution attacks, potentially leading to privilege escalation or arbitrary code execution in the user's browser. The lack of response from the project increases the exploitation risk.
Recommendation
Immediately update Inputmask to version 5.0.10 or later if available. If no patch is available, consider temporarily disabling the deep merge functionality or switching to an alternative library.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS