CVE-2026-46681

@nevware21/ts-utils is a comprehensive TypeScript/JavaScript utility library. Prior to version 0.14.0, the _copyProps function in lib/src/object/copy.ts uses for...in to iterate over source object properties without an Object.hasOwnProperty check, and does not filter dangerous keys (__proto__, constructor, prototype). This allows an attacker to pollute the prototype chain of all objects in the application. Version 0.14.0 patches the issue.

CVSS

No CVSS.

References

Link	Resource
https://github.com/nevware21/ts-utils/commit/5e887f4e2fbee7160c8f501634c45e6a229e83bb
https://github.com/nevware21/ts-utils/security/advisories/GHSA-x7j8-49r8-mr43
https://github.com/nevware21/ts-utils/security/advisories/GHSA-x7j8-49r8-mr43

Configurations

No configuration.

History

24 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) @nevware21/ts-utils es una completa biblioteca de utilidades de TypeScript/JavaScript. Antes de la versión 0.14.0, la función _copyProps en lib/src/object/copy.ts utiliza for...in para iterar sobre las propiedades del objeto de origen sin una comprobación de Object.hasOwnProperty, y no filtra claves peligrosas (__proto__, constructor, prototype). Esto permite a un atacante contaminar la cadena de prototipos de todos los objetos en la aplicación. La versión 0.14.0 soluciona el problema.

Information

Published : 2026-07-21 15:16

Updated : 2026-10-24 20:10

NVD link : CVE-2026-46681

Mitre link : CVE-2026-46681

CVE.ORG link : CVE-2026-46681

JSON object : View

Products Affected

No product.

CWE

CWE-1321

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

{"id": "CVE-2026-46681", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-46681", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-07-21T15:00:44.939446Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 7.2, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/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", "exploitMaturity": "UNREPORTED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "nevware21", "product": "ts-utils", "versions": [{"status": "affected", "version": "< 0.14.0"}]}]}], "published": "2026-07-21T15:16:35.177", "references": [{"url": "https://github.com/nevware21/ts-utils/commit/5e887f4e2fbee7160c8f501634c45e6a229e83bb", "source": "security-advisories@github.com"}, {"url": "https://github.com/nevware21/ts-utils/security/advisories/GHSA-x7j8-49r8-mr43", "source": "security-advisories@github.com"}, {"url": "https://github.com/nevware21/ts-utils/security/advisories/GHSA-x7j8-49r8-mr43", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-1321"}]}], "descriptions": [{"lang": "en", "value": "@nevware21/ts-utils is a comprehensive TypeScript/JavaScript utility library. Prior to version 0.14.0, the _copyProps function in lib/src/object/copy.ts uses for...in to iterate over source object properties without an Object.hasOwnProperty check, and does not filter dangerous keys (__proto__, constructor, prototype). This allows an attacker to pollute the prototype chain of all objects in the application. Version 0.14.0 patches the issue."}, {"lang": "es", "value": "@nevware21/ts-utils es una completa biblioteca de utilidades de TypeScript/JavaScript. Antes de la versi\u00f3n 0.14.0, la funci\u00f3n _copyProps en lib/src/object/copy.ts utiliza for...in para iterar sobre las propiedades del objeto de origen sin una comprobaci\u00f3n de Object.hasOwnProperty, y no filtra claves peligrosas (__proto__, constructor, prototype). Esto permite a un atacante contaminar la cadena de prototipos de todos los objetos en la aplicaci\u00f3n. La versi\u00f3n 0.14.0 soluciona el problema."}], "lastModified": "2026-10-24T20:10:00.137", "sourceIdentifier": "security-advisories@github.com"}