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security(env): setup build-time key sanitation to block private crede… #2171

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Merged
Priyanshu-byte-coder merged 3 commits into from
Jun 8, 2026
+57 −31
Merged

security(env): setup build-time key sanitation to block private crede… #2171

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cbd0e22
security(env): setup build-time key sanitation to block private crede…
VIDYANKSHINI Jun 7, 2026
10aa9c4
chore: add @next/env as devDependency and fix trailing whitespace
VIDYANKSHINI Jun 7, 2026
02e4a1e
Merge branch 'main' into security/build-time-env-validation
VIDYANKSHINI Jun 8, 2026
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40 changes: 11 additions & 29 deletions package-lock.json
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5 changes: 3 additions & 2 deletions package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@
"private": true,
"scripts": {
"dev": "next dev",
"build": "next build && node scripts/copy-standalone-static.js",
"build": "node scripts/validate-env.js && next build && node scripts/copy-standalone-static.js",
"start": "next start",
"lint": "next lint",
"type-check": "tsc --noEmit",
Expand Down Expand Up @@ -50,6 +50,7 @@
"tailwind-merge": "^3.6.0"
},
"devDependencies": {
"@next/env": "^16.2.7",
"@playwright/test": "1.60.0",
"@testing-library/dom": "^10.4.1",
"@testing-library/jest-dom": "^6.9.1",
Expand All @@ -60,9 +61,9 @@
"@types/react": "^18",
"@types/react-dom": "^18",
"@types/swagger-ui-react": "^5.18.0",
"@vitest/coverage-v8": "^1.6.1",
"@typescript-eslint/eslint-plugin": "^8.60.0",
"@typescript-eslint/parser": "^8.60.0",
"@vitest/coverage-v8": "^1.6.1",
"autoprefixer": "^10.4.19",
"eslint": "^8",
"eslint-config-next": "^14.2.35",
Expand Down
43 changes: 43 additions & 0 deletions scripts/validate-env.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,43 @@
const { loadEnvConfig } = require('@next/env');

// Load environment variables exactly as Next.js does
loadEnvConfig(process.cwd());
Comment on lines +1 to +4

const BLOCKED_KEYWORDS = [
'private_key',
'supabase_secret',
'database_url',
'service_role',
'admin_key',
'jwt_secret',
];

let hasError = false;

console.log('🔒 Validating environment variables...');

for (const [key, value] of Object.entries(process.env)) {
if (key.startsWith('NEXT_PUBLIC_')) {
const lowerKey = key.toLowerCase();
const lowerValue = (value || '').toLowerCase();

// Check if the key name contains any blocked private keywords
const isLeakingName = BLOCKED_KEYWORDS.some(kw => lowerKey.includes(kw));

// Check if the value looks like a raw private key string
const isLeakingValue = lowerValue.includes('-----begin private key-----') || lowerValue.includes('-----begin rsa private key-----');

if (isLeakingName || isLeakingValue) {
console.error(`\n🚨 SECURITY ERROR: Potentially private secret leaked into public variable: ${key}`);
console.error(` NEXT_PUBLIC_ prefix makes this variable visible to the browser!`);
hasError = true;
}
}
}

if (hasError) {
console.error('\n❌ Build halted due to environment variable security check failure.\n');
process.exit(1);
} else {
console.log('✅ Environment variable security check passed.\n');
}
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