CVE-2026-55091 | joaonuno flat-to-nested-js up to 1.1.1 Prototype Pollution index.js FlatToNested.prototype.convert id/parent prototype pollution

A vulnerability, which was classified as critical, was found in joaonuno flat-to-nested-js up to 1.1.1. This affects the function FlatToNested.prototype.convert of the file index.js of the component Prototype Pollution. Executing a manipulation of the argument id/parent can lead to improperly controlled modification of object prototype attributes.

This vulnerability is handled as CVE-2026-55091. The attack can be executed remotely. There is not any exploit available.

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