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  5. CVE-2026-24888

CVE-2026-24888: Maker.js has Unsafe Property Copying in makerjs.extendObject

January 29, 2026

The makerjs.extendObject function copies properties from source objects without proper validation, potentially exposing applications to security risks. The function lacks hasOwnProperty() checks and does not filter dangerous keys, allowing inherited properties and potentially malicious properties to be copied to target objects.

References

  • github.com/advisories/GHSA-2cp6-34r9-54xx
  • github.com/microsoft/maker.js
  • github.com/microsoft/maker.js/blob/98cffa82a372ff942194c925a12a311253587167/packages/maker.js/src/core/maker.ts
  • github.com/microsoft/maker.js/commit/85e0f12bd868974b891601a141974f929dec36b8
  • github.com/microsoft/maker.js/security/advisories/GHSA-2cp6-34r9-54xx
  • nvd.nist.gov/vuln/detail/CVE-2026-24888

Code Behaviors & Features

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Affected versions

All versions before 0.19.2

Fixed versions

  • 0.19.2

Solution

Upgrade to version 0.19.2 or above.

Impact 6.5 MEDIUM

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

Learn more about CVSS

Weakness

  • CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Source file

npm/makerjs/CVE-2026-24888.yml

Spotted a mistake? Edit the file on GitLab.

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