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.

The following products are affected by CVE-2026-34778 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-34778.

URL	Resource
https://github.com/electron/electron/security/advisories/GHSA-xj5x-m3f3-5x3h
https://nvd.nist.gov/vuln/detail/CVE-2026-34778
https://www.cve.org/CVERecord?id=CVE-2026-34778