What is CVE-2026-34767?

CVE-2026-34767 is a medium-severity vulnerability in Electron, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 5.9/10. Published 2026-04-03.

How severe is CVE-2026-34767?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Electron

CVE-2026-34767

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.3, 40.8.3, and 41.0.3, apps that register custom protocol handlers via protocol.handle() / protocol.regi…

EPSS: 0.000 (1.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N.

Affected products

Electron — versions < 38.8.6, >= 39.0.0-alpha.1, < 39.8.3, >= 40.0.0-alpha.1, < 40.8.3

Weakness classification (CWE)

References

https://github.com/electron/electron/security/advisories/GHSA-4p4r-m79c-wq3v (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-34767?: CVE-2026-34767 is a medium-severity vulnerability in Electron, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 5.9/10. Published 2026-04-03.
How severe is CVE-2026-34767?: Medium severity. CVSS v3 base score is 5.9 out of 10.