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Add vulnerable-test.js with MD5 hashing example #3841

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Add vulnerable-test.js with MD5 hashing example #3841

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7 changes: 7 additions & 0 deletions vulnerable-test.js
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Original file line number Diff line number Diff line change
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const crypto = require('crypto');
// CodeQL flags MD5 as a weak/broken cryptographic algorithm
const hash = crypto.createHash('md5').update('secret').digest('hex');

@gemini-code-assist gemini-code-assist Bot Jul 10, 2026

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security-critical critical

MD5 is a cryptographically broken hashing algorithm and should not be used for hashing passwords due to collision vulnerabilities. Use a strong, slow hashing algorithm like bcrypt or the built-in crypto.scrypt instead.

Suggested change
const hash = crypto.createHash('md5').update('secret').digest('hex');
const hash = crypto.scryptSync('secret', 'salt', 64).toString('hex');

console.log("Password hash:", hash);

// CodeQL flags hardcoded credentials
const dbPassword = "SuperSecretHardcodedPassword123!";

@gemini-code-assist gemini-code-assist Bot Jul 10, 2026

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security-critical critical

Hardcoding credentials in source code exposes them to unauthorized access and version control history leaks. Use environment variables or a secrets manager to retrieve sensitive configuration values.

Suggested change
const dbPassword = "SuperSecretHardcodedPassword123!";
const dbPassword = process.env.DB_PASSWORD;