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fix: properly sanitize github url #6

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Merged
ReenigneArcher merged 1 commit into from
Jan 28, 2026
Merged

fix: properly sanitize github url #6

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9 changes: 8 additions & 1 deletion scripts/build-index.cjs
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@

const fs = require('node:fs');
const path = require('node:path');
const { URL } = require('node:url');
const { glob } = require('glob');

// Version constants
Expand All @@ -20,11 +21,17 @@ const MASTER_INDEX_VERSION = '0.1.0';
* @returns {Promise<object|null>} Repository metadata or null if not available
*/
async function fetchGitHubMetadata(repoUrl) {
if (!repoUrl?.includes('github.com')) {
if (!repoUrl) {
return null;
}

try {
// Parse and validate the URL to prevent substring injection attacks
const url = new URL(repoUrl);
if (url.hostname !== 'github.com') {
return null;
}

// Extract owner/repo from URL
const match = new RegExp(/github\.com\/([^/]+)\/([^/]+)/).exec(repoUrl);
if (!match) {
Expand Down