merge-deep node module before 3.0.1 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability, which allows a malicious user to modify the prototype of "Object" via __proto__, causing the addition or modification of an existing property that will exist on all objects.
The product does not properly protect an assumed-immutable element from being modified by an attacker.
Link | Tags |
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https://github.com/jonschlinkert/merge-deep/commit/2c33634da7129a5aefcc262d2fec2e72224404e5 | third party advisory patch |
https://hackerone.com/reports/310708 | third party advisory exploit |