required/properties/dependencies 将 Object.prototype 属性名 (toString、constructor、__proto__) 视为数据中存在的属性

What version of Ajv are you using? Does the issue happen if you use the latest version?

[email protected] (latest). Also reproduces on master at f177fe32.

Ajv options object

const options = {} // defaults

JSON Schema

{"type": "object", "required": ["toString"]}

Sample data

{}

Your code

const Ajv = require("ajv")
const ajv = new Ajv(options)
console.log(ajv.validate(schema, data))

Validation result, data AFTER validation, error messages

true

Data is unchanged. No errors.