What is CVE-2026-70604?

CVE-2026-70604 is a high-severity vulnerability in Electron, classified under Permissive Cross-domain Policy with Untrusted Domains. CVSS score: 7.4/10. Published 2026-08-05.

How severe is CVE-2026-70604?

High severity. CVSS v3 base score is 7.4 out of 10.

Vulnerability in Electron

CVE-2026-70604

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 40.9.3, 41.4.0, and 42.0.0, a custom scheme registered with supportFetchAPI: true but without corsEnabled: true was n…

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N.

Affected products

Electron — versions < 39.8.10, >= 40.0.0-alpha.1, < 40.9.3, >= 41.0.0-alpha.1, < 41.4.0

Weakness classification (CWE)

CWE-942 — Permissive Cross-domain Policy with Untrusted Domains

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-70604?: CVE-2026-70604 is a high-severity vulnerability in Electron, classified under Permissive Cross-domain Policy with Untrusted Domains. CVSS score: 7.4/10. Published 2026-08-05.
How severe is CVE-2026-70604?: High severity. CVSS v3 base score is 7.4 out of 10.