Electron: Service worker can spoof executeJavaScript IPC replies_CVE-2026-34778

5.9 / 10

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N

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.

Basic Information

ID CVE-2026-34778

Source GitHub_M

Published Apr 3, 2026 at 23:59

Modified Apr 6, 2026 at 15:50

Affected Product

Vendor electron

Product electron

Version < 38.8.6

Affected Versions electron electron < 38.8.6
electron electron >= 39.0.0-alpha.1, < 39.8.1
electron electron >= 40.0.0-alpha.1, < 40.8.1
electron electron >= 41.0.0-alpha.1, < 41.0.0

CWE Classification

CWE-290 CWE-345

References

github.com /electron/electron/security/advisories/GHSA-xj5x-m3f3-5x3h

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