CVE-2026-34778
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.
- Affected products
- Electron
- Electronjs Electron
- < 38.8.6, 39.8.1, 40.8.1, 41.0.0
- Fix
- Available
- CVSS 3.1
- 6.5 MEDIUM
- EPSS
- 0.1% (2th percentile)
- Weakness
- CWE-290, CWE-345
- NVD status
- Analyzed
- Published
- 2026-04-03
No indexed exploits for CVE-2026-34778 yet
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No exploit for CVE-2026-34778 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.