CVE-2026-34778
Description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0, 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. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.
How to fix
- electronjs electron38.8.6, 39.8.1, 40.8.1 or later
- electron38.8.6, 39.8.1, 40.8.1, 41.0.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| electronjs electron | v < 38.8.6, 39.0.0 ≤ v < 39.8.1, 40.0.0 ≤ v < 40.8.1, 41.0.0 | 38.8.6, 39.8.1, 40.8.1 |
| electronnpm | v < 38.8.6, 39.0.0-alpha.1 ≤ v < 39.8.1, 40.0.0-alpha.1 ≤ v < 40.8.1, 41.0.0-alpha.1 ≤ v < 41.0.0 | 38.8.6, 39.8.1, 40.8.1, 41.0.0 |
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Attack Surface Management
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