CVE-2026-70612

Electron: Sandboxed iframes can launch external protocol handlers

Published Aug 5, 2026 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, requests to open external protocol URLs from web content did not take iframe sandbox restrictions into account, so a sandboxed iframe could cause an OS-registered external application to be launched. The frame sandbox state was also not made available to the app permission handlers, affecting apps that render untrusted content in sandboxed iframes and grant the openExternal permission by default when no setPermissionRequestHandler is installed. This issue is fixed in 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-p2rr-rvmm-c5fp Electron: Sandboxed iframes can launch external protocol handlers
History
Type Values Removed Values Added
First Time appeared Electronjs
Electronjs electron
CPEs cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:*
cpe:2.3:a:electronjs:electron:42.0.0:alpha1:*:*:*:node.js:*:*
cpe:2.3:a:electronjs:electron:42.0.0:alpha2:*:*:*:node.js:*:*
cpe:2.3:a:electronjs:electron:42.0.0:alpha3:*:*:*:node.js:*:*
cpe:2.3:a:electronjs:electron:42.0.0:alpha4:*:*:*:node.js:*:*
cpe:2.3:a:electronjs:electron:42.0.0:alpha5:*:*:*:node.js:*:*
cpe:2.3:a:electronjs:electron:42.0.0:alpha6:*:*:*:node.js:*:*
cpe:2.3:a:electronjs:electron:42.0.0:beta1:*:*:*:node.js:*:*
cpe:2.3:a:electronjs:electron:42.0.0:beta2:*:*:*: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': 'no', '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 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, requests to open external protocol URLs from web content did not take iframe sandbox restrictions into account, so a sandboxed iframe could cause an OS-registered external application to be launched. The frame sandbox state was also not made available to the app permission handlers, affecting apps that render untrusted content in sandboxed iframes and grant the openExternal permission by default when no setPermissionRequestHandler is installed. This issue is fixed in 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.
Title Electron: Sandboxed iframes can launch external protocol handlers
Weaknesses CWE-284
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Aug 5, 2026, 7:03 PM
Reserved
Aug 4, 2026, 7:50 PM
Status
Analyzed
Published
Aug 5, 2026, 7:17 PM
Modified
Oct 8, 2026, 1:49 PM