Electron up to 38.8.5/39.7.x/40.6.x Event Call authorization

Summaryinfo

A vulnerability was found in Electron up to 38.8.5/39.7.x/40.6.x. It has been rated as problematic. Affected by this issue is some unknown functionality of the component Event Call Handler. Performing a manipulation results in authorization. This vulnerability is reported as CVE-2026-34766. The attack requires a local approach. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in Electron up to 38.8.5/39.7.x/40.6.x. This affects an unknown function of the component Event Call Handler. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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, the select-usb-device event callback did not validate the chosen device ID against the filtered list that was presented to the handler. An app whose handler could be influenced to select a device ID outside the filtered set would grant access to a device that did not match the renderer's requested filters or was listed in exclusionFilters. The WebUSB security blocklist remained enforced regardless, so security-sensitive devices on the blocklist were not affected. The practical impact is limited to apps with unusual device-selection logic. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-34766 since 03/30/2026. The exploitability is told to be difficult. An attack has to be approached locally. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

Upgrading to version 38.8.6, 39.8.0, 40.7.0 or 41.0.0-beta.8 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• Electron

Version

• 38.8.0
• 38.8.1
• 38.8.2
• 38.8.3
• 38.8.4
• 38.8.5
• 39.0
• 39.1
• 39.2
• 39.3
• 39.4
• 39.5
• 39.6
• 39.7
• 40.0
• 40.1
• 40.2
• 40.3
• 40.4
• 40.5
• 40.6

Website

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

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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