Time-of-check Time-of-use (TOCTOU) Race Condition Affecting org.webjars.npm:electron package, versions [42.0.0-alpha.1,42.0.0-beta.2)[40.0.0-alpha.2,41.10.5)[,39.8.10)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published13 Oct 2026
- disclosed29 Sept 2026
- creditUnknown
Introduced: 29 Sep 2026
NewCVE-2026-102672 (opens in a new tab)How to fix?
Upgrade org.webjars.npm:electron to version 42.0.0-beta.2, 41.10.5, 39.8.10 or higher.
Overview
org.webjars.npm:electron is a framework which lets you write cross-platform desktop applications using JavaScript, HTML and CSS.
Affected versions of this package are vulnerable to Time-of-check Time-of-use (TOCTOU) Race Condition via the Squirrel.Mac installer component (SQRLInstaller), where the target bundle URL read from a serialized request on disk is re-evaluated at multiple points in the install signal chain rather than being resolved once to a canonical path. A local attacker can substitute a symlink between validation and use steps, redirecting a privileged install to an arbitrary location and achieving arbitrary code execution or full compromise of confidentiality, integrity, and availability.
Note: This is only exploitable on macOS in applications that ship Squirrel.Mac-based auto-updates.