CVE-2026-70612 Electron: Sandboxed iframes can launch external protocol handlers

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, requests to open external protocol URLs from web content did not take iframe sandbox restrictions into account, so a sandboxed iframe could...

CVE-2026-70612

The vulnerability CVE-2026-70612 affects Electron. It occurs when web content in sandboxed iframes can trigger external protocol handlers, because iframe sandbox restrictions were not applied to openExternal requests and the frame state wasn’t exposed to permission handlers. This could allow an O...

GHSA-R5P7-GP4J-QHRX Electron: Incorrect origin passed to permission request handler for iframe requests

Impact When an iframe requests fullscreen, pointerLock, keyboardLock, openExternal, or media permissions, the origin passed to session.setPermissionRequestHandler was the top-level page's origin rather than the requesting iframe's origin. Apps that grant permissions based on the origin parameter ...