Auth bypass in Electron
CVE-2026-34766
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (6.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 6.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Electron — versions < 38.8.6, >= 39.0.0-alpha.1, < 39.8.0, >= 40.0.0-alpha.1, < 40.7.0
- Electronjs Electron — versions 41.0.0
Weakness classification (CWE)
References
- github.com/electron/electron/security/advisories/GHSA-9899-m83m-qhpj (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-34766?
- CVE-2026-34766 is a low-severity vulnerability in Electron, classified under Missing Authorization. CVSS score: 3.3/10. Published 2026-04-04.
- How severe is CVE-2026-34766?
- Low severity. CVSS v3 base score is 3.3 out of 10.