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Vulnerability · Published Apr 3, 2026 · Assigned by GitHub_M

CVE-2026-34769Electron: Renderer command-line switch injection via undocumented commandLineSwitches webPreference

High 7.8

In plain English

A high-severity argument injection in electron from electron. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.3%top 77.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
npmelectron38.8.6GHSA-9wfr-w7mm-pc7f
npmelectron39.8.0GHSA-9wfr-w7mm-pc7f
npmelectron40.7.0GHSA-9wfr-w7mm-pc7f
npmelectron41.0.0-beta.8GHSA-9wfr-w7mm-pc7f

Affected products (as reported)

VendorProductVersions
electron electron < 38.8.6>= 39.0.0-alpha.1, < 39.8.0>= 40.0.0-alpha.1, < 40.7.0>= 41.0.0-alpha.1, < 41.0.0-beta.8

Weakness: CWE-88, CWE-912 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

References