CVE-2026-55091: Flat To Nested Proto Pollution
A plain object `{}` is used as a dictionary map for objects from an array, with a key derived directly from the object's properties. If the key is controlled by an attacker (e.g., `__proto__`), this can lead to Prototype Pollution. Use `Object.create(null)` to safely store items without inheriting from `Object.prototype`.
JSgreprules fetch cve-2026-55091-flat-to-nested-proto-pollution --engine opengrepDescription
A plain object `{}` is used as a dictionary map for objects from an array, with a key derived directly from the object's properties. If the key is controlled by an attacker (e.g., `__proto__`), this can lead to Prototype Pollution. Use `Object.create(null)` to safely store items without inheriting from `Object.prototype`.
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