CVE-2026-102676: Electron: <webview> can enable Node.js integration in Web Workers despite embedder restrictions

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-29 · updated 2026-10-15
Weakness: CWE-269

Description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5, an Electron <webview> guest could enable nodeIntegrationInWorker for its Web Workers even when the unsandboxed embedder had Node.js integration disabled, allowing untrusted guest content to create a Node-enabled worker with more privilege than the embedder granted. Applications that do not enable the <webview> tag or that keep the embedder sandboxed are not affected. This issue is fixed in versions 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5.

Affected products

electron: before 41.10.6; from 42.0.0 before 42.9.2; from 43.0.0 before 43.4.1; 44.0.0-alpha1, 44.0.0-alpha2, 44.0.0-alpha3, 44.0.0-alpha4, 44.0.0-alpha5, 44.0.0-alpha6 (+7) — fixed in 41.10.6, 42.9.2, 43.4.1

How to fix

Upgrade to a fixed version: electron 41.10.6, 42.9.2, 43.4.1. Check the vendor advisory for mitigations.

References

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