What is CVE-2026-34771?

CVE-2026-34771 is a high-severity vulnerability in Electron, classified under Use After Free. CVSS score: 7.5/10. Published 2026-04-03.

How severe is CVE-2026-34771?

High severity. CVSS v3 base score is 7.5 out of 10.

Use After Free in Electron

CVE-2026-34771

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, apps that register an asynchronous session.setPermissionRequestHandler() m…

Vulnerability class: Use-After-Free

EPSS: 0.000 (4.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Electron — versions < 38.8.6, >= 39.0.0-alpha.1, < 39.8.0, >= 40.0.0-alpha.1, < 40.7.0

Weakness classification (CWE)

CWE-416 — Use After Free

References

https://github.com/electron/electron/security/advisories/GHSA-8337-3p73-46f4 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-34771?: CVE-2026-34771 is a high-severity vulnerability in Electron, classified under Use After Free. CVSS score: 7.5/10. Published 2026-04-03.
How severe is CVE-2026-34771?: High severity. CVSS v3 base score is 7.5 out of 10.