Unauthorized USB access via unvalidated device selection
Published Apr 3, 2026 · Updated Apr 3, 2026
Authorization bypass in Electron allows local users to obtain access to USB devices excluded by a renderer's request filters. The select-usb-device callback accepts a handler-supplied device ID without confirming that it belongs to the filtered device list presented to the handler. Exploitation requires an app with influenceable, unusual selection logic; Chromium's WebUSB security blocklist still prevents access to blocklisted devices.
Summary
What happened
Authorization bypass in Electron allows local users to obtain access to USB devices excluded by a renderer's request filters. The select-usb-device callback accepts a handler-supplied device ID without confirming that it belongs to the filtered device list presented to the handler. Exploitation requires an app with influenceable, unusual selection logic; Chromium's WebUSB security blocklist still prevents access to blocklisted devices.
The record
- CVE
- CVE-2026-34766
- Published
- Apr 3, 2026
- Updated
- Apr 3, 2026
- Vendor
- Electron
- Product
- Electron
- Classifications
- CWE-862
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 3, 2026CVE publishedPublication date reported by the CVE source.
- Apr 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 38.8.6
- Affected versionversion=>= 39.0.0-alpha.1, < 39.8.0
- Affected versionversion=>= 40.0.0-alpha.1, < 40.7.0
- Affected versionversion=>= 41.0.0-alpha.1, < 41.0.0-beta.8
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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