Leading control characters in a URL are not stripped when passed into url-parse. This can cause input URLs to be mistakenly be interpreted as a relative URL without a hostname and protocol, while the WHATWG URL parser will trim control characters and treat it as an absolute URL.If url-parse is used in security decisions involving the hostname / protocol, and the input URL is used in a client which uses the WHATWG URL parser, the decision may be incorrect.This can also lead to a cross-site scripting (XSS) vulnerability if url-parse is used to check for the javascript: protocol in URLs. See following example:```jsconst parse = require('url-parse')const express = require('express')const app = express()const port = 3000url = parse(\"\\bjavascript:alert(1)\")console.log(url)app.get('/', (req, res) => { if (url.protocol !== \"javascript:\") {res.send(\"CLICK ME!\")} })app.listen(port, () => { console.log(`Example app listening on port ${port}`) })```
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