CVE-2026-70607

MEDIUM 5.3

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

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-20
Vendor	electron
Product	electron
Published	Aug 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

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

References

NVD ↗ CVE.org ↗ EPSS Data ↗