CVE-2026-70608

Electron: Sandboxed iframe can bypass the allow-popups restriction via the OpenURL navigation path

Published Aug 5, 2026 CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
Description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 41.10.3, and 42.0.1, a sandboxed iframe without the allow-popups keyword could still open a new window or trigger setWindowOpenHandler with no user interaction because new-window navigations taking the OpenURL path did not apply the iframe sandbox popup restriction. Apps that embed untrusted content in sandboxed iframes and rely on the absence of allow-popups to prevent window creation are affected, while apps that deny window creation in setWindowOpenHandler or do not embed untrusted content in sandboxed iframes are not affected. This issue is fixed in 39.8.10, 41.10.3, and 42.0.1.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-9f4c-93c8-jc8g Electron: Sandboxed iframe can bypass the allow-popups restriction via the OpenURL navigation path
History
Type Values Removed Values Added
First Time appeared Electronjs
Electronjs electron
CPEs cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:*
Vendors & Products Electronjs
Electronjs electron
Type Values Removed Values Added
First Time appeared Electron
Electron electron
Vendors & Products Electron
Electron electron
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 41.10.3, and 42.0.1, a sandboxed iframe without the allow-popups keyword could still open a new window or trigger setWindowOpenHandler with no user interaction because new-window navigations taking the OpenURL path did not apply the iframe sandbox popup restriction. Apps that embed untrusted content in sandboxed iframes and rely on the absence of allow-popups to prevent window creation are affected, while apps that deny window creation in setWindowOpenHandler or do not embed untrusted content in sandboxed iframes are not affected. This issue is fixed in 39.8.10, 41.10.3, and 42.0.1.
Title Electron: Sandboxed iframe can bypass the allow-popups restriction via the OpenURL navigation path
Weaknesses CWE-1021
CWE-693
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Aug 5, 2026, 6:46 PM
Reserved
Aug 4, 2026, 7:50 PM
Status
Analyzed
Published
Aug 5, 2026, 6:17 PM
Modified
Oct 8, 2026, 1:53 PM