RobinHerbots Inputmask Internal Deep Merge Helper extend.js extendAliases prototype pollution

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-16150
StatePUBLISHED
AssignerVulDB
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-18 20:17:29 UTC
Updated2026-07-20 16:16:56 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v4.0 5.3 MEDIUM from [email protected]

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.002560000 probability, percentile 0.171190000 (date 2026-07-20)

Problem Types: CWE-94 | CWE-1321 | CWE-1321 Improperly Controlled Modification of Object Prototype Attributes | CWE-94 Code Injection

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary5.3MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/C...
4.0CNADECLARED5.3MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
3.1[email protected]Secondary6.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
3.1CNADECLARED6.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
3.0CNADECLARED6.3MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
2.0[email protected]Secondary6.5AV:N/AC:L/Au:S/C:P/I:P/A:P
2.0CNADECLARED6.5AV:N/AC:L/Au:S/C:P/I:P/A:P/E:ND/RL:ND/RC:UR

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA RobinHerbots Inputmask affected 5.0.0 Not specified
CNA RobinHerbots Inputmask affected 5.0.1 Not specified
CNA RobinHerbots Inputmask affected 5.0.2 Not specified
CNA RobinHerbots Inputmask affected 5.0.3 Not specified
CNA RobinHerbots Inputmask affected 5.0.4 Not specified
CNA RobinHerbots Inputmask affected 5.0.5 Not specified
CNA RobinHerbots Inputmask affected 5.0.6 Not specified
CNA RobinHerbots Inputmask affected 5.0.7 Not specified
CNA RobinHerbots Inputmask affected 5.0.8 Not specified
CNA RobinHerbots Inputmask affected 5.0.9 Not specified

References

ReferenceSourceLinkTags
github.com/RobinHerbots/Inputmask [email protected] github.com
github.com/RobinHerbots/Inputmask/issues/2885 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
vuldb.com/vuln/379909/cti [email protected] vuldb.com
vuldb.com/submit/856979 [email protected] vuldb.com
vuldb.com/cve/CVE-2026-16150 [email protected] vuldb.com
vuldb.com/vuln/379909 [email protected] vuldb.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: wjm1 (VulDB User) (en)

CNA: VulDB CNA Team (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-07-17T00:00:00.000ZAdvisory disclosed
CNA2026-07-17T02:00:00.000ZVulDB entry created
CNA2026-07-17T21:06:50.000ZVulDB entry last update

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