Vulnerability in Electron

CVE-2026-114121

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 42.11.3, 43.7.0, 44.3.0, and 45.0.0-alpha.5, requests to open external protocol URLs could be attributed to a document other than the one that initiated them, causing the requestingUrl passed to session.setPermissionRequestHandler to identify trusted content for a launch requested by untrusted content. An application that grants openExternal based on the requesting origin and allows untrusted content to open or navigate windows could therefore allow that content to launch an OS-registered external application. This issue is fixed in versions 42.11.3, 43.7.0, 44.3.0, and 45.0.0-alpha.5.

Published .

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

  • Electron — versions < 42.11.3, >= 43.0.0-alpha.1, < 43.7.0, >= 44.0.0-alpha.1, < 44.3.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-114121?
CVE-2026-114121 is a medium-severity vulnerability in Electron, classified under Origin Validation Error. CVSS score: 5.4/10. Published 2026-10-21.
How severe is CVE-2026-114121?
Medium severity. CVSS v3 base score is 5.4 out of 10.