CVE-2026-16150: Improperly Controlled Modification of Object Prototype Attributes in RobinHerbots Inputmask
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.
AI Analysis
Technical Summary
The vulnerability in RobinHerbots Inputmask affects the functions extendDefaults, extendDefinitions, and extendAliases within the internal deep merge helper (lib/dependencyLibs/extend.js). These functions allow improper modification of object prototype attributes, which can lead to prototype pollution. The issue exists in all versions up to and including 5.0.9. The vulnerability can be triggered remotely and does not require user interaction or elevated privileges. The vendor has not yet responded with a fix or advisory.
Potential Impact
Successful exploitation could allow an attacker to manipulate object prototype attributes, potentially leading to unexpected behavior or security issues in applications using the vulnerable Inputmask versions. The CVSS 4.0 base score is 5.3 (medium), indicating limited but notable impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or temporary mitigation has been announced, users should monitor for updates from RobinHerbots. Until a patch is available, consider avoiding use of affected versions or implementing application-level protections against prototype pollution if feasible.
CVE-2026-16150: Improperly Controlled Modification of Object Prototype Attributes in RobinHerbots Inputmask
Description
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.
CVSS v4.0
Score 5.3medium
Affected software
cpe:2.3:a:robinherbots:inputmask:*:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in RobinHerbots Inputmask affects the functions extendDefaults, extendDefinitions, and extendAliases within the internal deep merge helper (lib/dependencyLibs/extend.js). These functions allow improper modification of object prototype attributes, which can lead to prototype pollution. The issue exists in all versions up to and including 5.0.9. The vulnerability can be triggered remotely and does not require user interaction or elevated privileges. The vendor has not yet responded with a fix or advisory.
Potential Impact
Successful exploitation could allow an attacker to manipulate object prototype attributes, potentially leading to unexpected behavior or security issues in applications using the vulnerable Inputmask versions. The CVSS 4.0 base score is 5.3 (medium), indicating limited but notable impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or temporary mitigation has been announced, users should monitor for updates from RobinHerbots. Until a patch is available, consider avoiding use of affected versions or implementing application-level protections against prototype pollution if feasible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-07-17T19:01:44.871Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a5bd7272a4a8d59892ef2bb
Added to database: 07/18/2026, 19:42:31 UTC
Last enriched: 07/25/2026, 22:50:51 UTC
Last updated: 08/31/2026, 05:53:56 UTC
Views: 87
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