CVE-2026-70607

MEDIUM

Electron: window.open features string controls some window options considered privileged

Title source: cna
STIX 2.1

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.

References (13)

Core 13
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/electron/electron/pull/50946
X_Refsource_Misc x_refsource_misc
https://github.com/electron/electron/pull/50947
X_Refsource_Misc x_refsource_misc
https://github.com/electron/electron/pull/50948
X_Refsource_Misc x_refsource_misc
https://github.com/electron/electron/pull/50949

Scores

CVSS v3 5.3
EPSS 0.0034
EPSS Percentile 26.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-20
Status published
Products (8)
electron/electron < 39.8.8
electron/electron >= 40.0.0-alpha.1, < 40.9.0
electron/electron >= 41.0.0-alpha.1, < 41.2.1
electron/electron >= 42.0.0-alpha.1, < 42.0.0-beta.3
npm/electron 0 - 39.8.8npm
npm/electron 40.0.0-alpha.1 - 40.9.0npm
npm/electron 41.0.0-alpha.1 - 41.2.1npm
npm/electron 42.0.0-alpha.1 - 42.0.0-beta.3npm
Published Aug 05, 2026
Tracked Since Aug 05, 2026