GHSA-jfqg-hf23-qpw2 Electron: Context Isolation bypass via contextBridge VideoFrame transfer

• npm electron: >= 39.0.0-alpha.1, < 39.8.0 → fixed in 39.8.0 • npm electron: >= 40.0.0-alpha.1, < 40.7.0 → fixed in 40.7.0 • npm electron: >= 41.0.0-alpha.1, < 41.0.0-beta.8 → fixed in 41.0.0-beta.8

Impact Apps that pass `VideoFrame` objects (from the WebCodecs API) across the `contextBridge` are vulnerable to a context isolation bypass. An attacker who can execute JavaScript in the main world (for example, via XSS) can use a bridged `VideoFrame` to gain access to the isolated world, including any Node.js APIs exposed to the preload script. Apps are only affected if a preload script returns, resolves, or passes a `VideoFrame` object to the main world via `contextBridge.exposeInMainWorld()`. Apps that do not bridge `VideoFrame` objects are not affected. Workarounds Do not pass `VideoFrame` objects across `contextBridge`. If an app needs to transfer video frame data, serialize it to an `ArrayBuffer` or `ImageBitmap` before bridging. Fixed Versions • `41.0.0-beta.8` • `40.7.0` • `39.8.0` For more information If there are any questions or comments about this advisory, please email [email protected]