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Vulnerability · Published Aug 5, 2026 · Assigned by GitHub_M

CVE-2026-70607Electron: window.open features string controls some window options considered privileged

Medium 5.3

In plain English

A medium-severity improper input validation in electron from electron. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.6%top 53.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, some window options supplied by web content in the window.open() features string were applied to the new BrowserWindow without an allowlist. Untrusted content could set window options it should not control, including options that cause the main process to access attacker-chosen file or network paths, when untrusted content can call window.open() and the app does not override child window options via setWindowOpenHandler or overrideBrowserWindowOptions. This issue is fixed in 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
npmelectron39.8.8GHSA-v93f-fgjr-hjrj
npmelectron40.9.0GHSA-v93f-fgjr-hjrj
npmelectron41.2.1GHSA-v93f-fgjr-hjrj
npmelectron42.0.0-beta.3GHSA-v93f-fgjr-hjrj

Affected products (as reported)

VendorProductVersions
electron electron < 39.8.8>= 40.0.0-alpha.1, < 40.9.0>= 41.0.0-alpha.1, < 41.2.1>= 42.0.0-alpha.1, < 42.0.0-beta.3

Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References