What is CVE-2026-34773?

CVE-2026-34773 is a medium-severity vulnerability in Electron, classified under Improper Input Validation. CVSS score: 4.7/10. Published 2026-04-03.

How severe is CVE-2026-34773?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Improper input validation in Electron

CVE-2026-34773

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0, on Windows, app.setAsDefaultProtocolClient(protocol) did not validate the protoco…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.000 (6.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Electron — versions < 38.8.6, >= 39.0.0-alpha.1, < 39.8.1, >= 40.0.0-alpha.1, < 40.8.1

Weakness classification (CWE)

References

https://github.com/electron/electron/security/advisories/GHSA-mwmh-mq4g-g6gr (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-34773?: CVE-2026-34773 is a medium-severity vulnerability in Electron, classified under Improper Input Validation. CVSS score: 4.7/10. Published 2026-04-03.
How severe is CVE-2026-34773?: Medium severity. CVSS v3 base score is 4.7 out of 10.