CVE-2021-26707

The merge-deep library before 3.0.3 for Node.js can be tricked into overwriting properties of Object.prototype or adding new properties to it. These properties are then inherited by every object in the program, thus facilitating prototype-pollution attacks against applications using this library.

• CWE-1321

• https://github.com/jonschlinkert/merge-deep/commit/11e5dd56de8a6aed0b1ed022089dbce6968d82a5Patch, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210716-0008/Third Party Advisory
• https://securitylab.github.com/advisories/GHSL-2020-160-merge-deep/Third Party Advisory
• https://www.npmjs.com/package/merge-deepProduct, Third Party Advisory
• https://github.com/jonschlinkert/merge-deep/commit/11e5dd56de8a6aed0b1ed022089dbce6968d82a5Patch, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210716-0008/Third Party Advisory
• https://securitylab.github.com/advisories/GHSL-2020-160-merge-deep/Third Party Advisory
• https://www.npmjs.com/package/merge-deepProduct, Third Party Advisory

Published

Jun 2, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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