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.
CWE
- CWE-290 — CWE-290: Authentication Bypass by Spoofing
- CWE-345 — CWE-345: Insufficient Verification of Data Authenticity
Affected
- electron / electron — v=< 38.8.6 [affected]; v=>= 39.0.0-alpha.1, < 39.8.1 [affected]; v=>= 40.0.0-alpha.1, < 40.8.1 [affected]; v=>= 41.0.0-alpha.1, < 41.0.0 [affected]
CVSS
- 3.1 score=5.9 severity=MEDIUM
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
References
- https://github.com/electron/electron/security/advisories/GHSA-xj5x-m3f3-5x3h x_refsource_CONFIRM
Source
cvelistV5-main/cves/2026/34xxx/CVE-2026-34778.json