Electron: Sandboxed iframe can bypass the allow-popups restriction via the OpenURL navigation path

Impact A sandboxed iframe without the allow-popups keyword could still open a new window or trigger setWindowOpenHandler with no user interaction, because new-window navigations taking the OpenURL path did not apply the iframe sandbox popup restriction. Apps that embed untrusted content in...

CVE-2026-70608

Summary: Electron before versions 39.8.10, 41.10.3, and 42.0.1 allowed a sandboxed iframe without the allow-popups keyword to open a new window or trigger setWindowOpenHandler with no user interaction via OpenURL navigation, bypassing the iframe popup restriction. What’s affected: Electron apps e...