CVE-2026-34778
CVE-2026-34778 · Electron: Service worker can spoof executeJavaScript IPC replies
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 5.9 · Medium · EPSS 0.1% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
electron
- Versions
- < 38.8.6: Affected
- >= 39.0.0-alpha.1, < 39.8.1: Affected
- >= 40.0.0-alpha.1, < 40.8.1: Affected
- >= 41.0.0-alpha.1, < 41.0.0: Affected
No fix published
electron npm
- Affected ranges
- SEMVER: < 38.8.6
Update to 38.8.6
electron npm
- Affected ranges
- SEMVER: ≥ 39.0.0-alpha.1, < 39.8.1
Update to 39.8.1
electron npm
- Affected ranges
- SEMVER: ≥ 40.0.0-alpha.1, < 40.8.1
Update to 40.8.1
electron npm
- Affected ranges
- SEMVER: ≥ 41.0.0-alpha.1, < 41.0.0
Update to 41.0.0