GHSA-xj5x-m3f3-5x3h Electron: Service worker can spoof executeJavaScript IPC replies

• npm electron: < 38.8.6 → fixed in 38.8.6 • npm electron: >= 39.0.0-alpha.1, < 39.8.1 → fixed in 39.8.1 • npm electron: >= 40.0.0-alpha.1, < 40.8.1 → fixed in 40.8.1 • npm electron: >= 41.0.0-alpha.1, < 41.0.0 → fixed in 41.0.0

Impact A service worker running in a session could spoof reply messages on the internal IPC channel used by `webContents.executeJavaScript()` and related methods, causing the main-process promise to resolve with attacker-controlled data. Apps are only affected if they have service workers registered and use the result of `webContents.executeJavaScript()` (or `webFrameMain.executeJavaScript()`) in security-sensitive decisions. Workarounds Do not trust the return value of `webContents.executeJavaScript()` for security decisions. Use dedicated, validated IPC channels for security-relevant communication with renderers. Fixed Versions • `41.0.0` • `40.8.1` • `39.8.1` • `38.8.6` For more information If there are any questions or comments about this advisory, please email [email protected]