Electron up to 39.8.7/40.8.x/41.2.0/42.0.0-beta.2 Autofill Popup clickjacking

Summaryinfo

A vulnerability was found in Electron up to 39.8.7/40.8.x/41.2.0/42.0.0-beta.2. It has been declared as problematic. This issue affects some unknown processing of the component Autofill Popup. The manipulation results in clickjacking. This vulnerability is known as CVE-2026-70600. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as problematic has been found in Electron up to 39.8.7/40.8.x/41.2.0/42.0.0-beta.2. Affected is some unknown processing of the component Autofill Popup. The manipulation with an unknown input leads to a clickjacking vulnerability. CWE is classifying the issue as CWE-451. The user interface (UI) does not properly represent critical information to the user, allowing the information - or its source - to be obscured or spoofed. This is often a component in phishing attacks. This is going to have an impact on integrity. CVE summarizes:

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, the native autofill popup could be positioned by a cross-origin iframe outside that iframe's bounds, over the embedding page's UI, enabling clickjacking or spoofing of trusted UI. Apps are only affected if they embed untrusted content in iframes within windows that also display trusted UI. Apps that do not embed untrusted third-party content are not affected. This issue is fixed in versions 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-70600 since 08/04/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1566.003.

Upgrading to version 39.8.8, 40.9.0, 41.2.1 or 42.0.0-beta.3 eliminates this vulnerability.

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Productinfo

Name

• Electron

Version

• 39.8.0
• 39.8.1
• 39.8.2
• 39.8.3
• 39.8.4
• 39.8.5
• 39.8.6
• 39.8.7
• 40.0
• 40.1
• 40.2
• 40.3
• 40.4
• 40.5
• 40.6
• 40.7
• 40.8
• 41.0
• 41.1
• 41.2.0
• 42.0.0-beta.0
• 42.0.0-beta.1
• 42.0.0-beta.2

Website

• Product: https://github.com/electron/electron/

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