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CVE-2026-34778

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CVE-2026-34778

Published: Apr 3, 2026

Modified: Apr 6, 2026

PUBLISHED

CVSS v3.1

5.9

MEDIUM

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.

VendorProductVersions

electron

electron

affected
< 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

Weaknesses (CWE)

CWE-290
CWE-345

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

None

References

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