CVE-2026-70603: Electronjs Electron

Medium severity, CVSS 6.0. EPSS: 0.1% chance of exploitation in the next 30 days.

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.6, 40.9.0, 41.1.1, and 42.0.0-beta.1, shell.openPath() did not reject paths containing embedded null bytes. Apps that perform string-only validation of file paths, for example checking the file extension, before passing them to shell.openPath() could be bypassed, allowing an attacker-controlled path to open a different file than the one that passed validation. Apps are only affected if they pass paths derived from untrusted input to shell.openPath() and rely on string-based validation without a filesystem check. This issue is fixed in versions 39.8.6, 40.9.0, 41.1.1, and 42.0.0-beta.1.

Affected products

• Electronjs Electron: before 39.8.6 (fixed in 39.8.6); from 40.0.0, before 40.9.0 (fixed in 40.9.0); from 41.0.0, before 41.1.1 (fixed in 41.1.1); version 42.0.0 only

Published 2026-08-05. Last modified 2026-10-08.