| Package | Affected versions | Patched versions |
|---|---|---|
| electron | = 42.0.0≥ 40.0.0, < 40.9.2≥ 41.0.0, < 41.2.2< 39.8.9 | 40.9.241.2.239.8.9 |
| electron | ≥ 40.0.0-alpha.1, < 40.9.2≥ 41.0.0-alpha.1, < 41.2.2≥ 42.0.0-alpha.1, < 42.0.0-beta.5< 39.8.9 | 40.9.241.2.242.0.0-beta.539.8.9 |
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.
There are no app side workarounds, you must update to a patched version of Electron.
42.0.0-beta.541.2.240.9.239.8.9If you have any questions or comments about this advisory, email Electron at [email protected]
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