CVE-2026-34769

Electron: Renderer command-line switch injection via undocumented commandLineSwitches webPreference

State: Published
Severity: 7.8 High
Published: Apr 3, 2026
Updated: Jul 15, 2026
Reserved: Mar 30, 2026

Description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, an undocumented commandLineSwitches webPreference allowed arbitrary switches to be appended to the renderer process command line. Apps that construct webPreferences by spreading untrusted configuration objects may inadvertently allow an attacker to inject switches that disable renderer sandboxing or web security controls. Apps are only affected if they construct webPreferences from external or untrusted input without an allowlist. Apps that use a fixed, hardcoded webPreferences object are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H	GitHub_M
3.1	7.7 High	CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H	redhat-SADP

Weaknesses

CWE-88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
CWE-912 Hidden Functionality

Affected Products

Product	Versions
electronelectron	< 38.8.6Affected >= 39.0.0-alpha.1, < 39.8.0Affected >= 40.0.0-alpha.1, < 40.7.0Affected >= 41.0.0-alpha.1, < 41.0.0-beta.8Affected

References

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