Improper input validation in Electron

CVE-2026-102677

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From 42.3.3 until 42.10.0, 43.5.0, and 44.0.0-beta.6, Electron's sandboxed preload code cache did not verify that a cached entry matched the preload it was served for. A compromised renderer could write attacker-controlled cache data and cause Electron to reuse it for a later load, executing the renderer's code in the more privileged preload context. The issue affects applications that load untrusted content. This issue is fixed in versions 42.10.0, 43.5.0, and 44.0.0-beta.6.

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

Published .

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.

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 >= 42.3.3, < 42.10.0, >= 43.0.0-beta.1, < 43.5.0, >= 44.0.0-alpha.1, < 44.0.0-beta.6

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-102677?
CVE-2026-102677 is a high-severity vulnerability in Electron, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2026-09-29.
How severe is CVE-2026-102677?
High severity. CVSS v3 base score is 7.8 out of 10.