CVE-2021-26707: Prototype Pollution

June 2, 2021 (updated December 2, 2022)

The merge-deep library 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.

References

nvd.nist.gov/vuln/detail/CVE-2021-26707

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