GHSA-h7rp-cf8h-j98x Electron: Context isolation bypass via Function.prototype.bind hijack

• npm electron: < 39.8.9 → fixed in 39.8.9 • npm electron: >= 40.0.0-alpha.1, < 40.9.2 → fixed in 40.9.2 • npm electron: >= 41.0.0-alpha.1, < 41.2.2 → fixed in 41.2.2 • npm electron: >= 42.0.0-alpha.1, < 42.0.0-beta.5 → fixed in 42.0.0-beta.5

Impact Apps that expose Promise-returning functions to web content via `contextBridge` may be vulnerable to a context isolation bypass. Untrusted web content could obtain access to the isolated preload world and, through it, every capability the preload script has. In renderers without a sandbox, or with `nodeIntegration` enabled, this may escalate to Node.js access. Apps are affected if they expose Promise-returning functions via `contextBridge` — the standard pattern for wrapping `ipcRenderer.invoke` — in windows that load untrusted content. Apps that never load untrusted content in those windows are not affected. Workarounds There are no app side workarounds, you must update to a patched version of Electron. Fixed Versions • `42.0.0-beta.5` • `41.2.2` • `40.9.2` • `39.8.9` For more information If you have any questions or comments about this advisory, email Electron at [email protected]