CVE-2026-34774

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 39.8.1, 40.7.0, and 41.0.0, apps that use offscreen rendering and allow child windows via window.open() may be vulnerable to a use-after-free. If the parent offscreen WebContents is destroyed while a child window remains open, subsequent paint frames on the child dereference freed memory, which may lead to a crash or memory corruption. Apps are only affected if they use offscreen rendering (webPreferences.offscreen: true) and their setWindowOpenHandler permits child windows. Apps that do not use offscreen rendering, or that deny child windows, are not affected. This issue has been patched in versions 39.8.1, 40.7.0, and 41.0.0.

The following products are affected by CVE-2026-34774 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-34774.

URL	Resource
https://github.com/electron/electron/security/advisories/GHSA-532v-xpq5-8h95
https://nvd.nist.gov/vuln/detail/CVE-2026-34774
https://www.cve.org/CVERecord?id=CVE-2026-34774