CVE-2026-70612

MEDIUM

Electron: Sandboxed iframes can launch external protocol handlers

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, 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.

References (13)

Core 13
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/electron/electron/pull/50961
X_Refsource_Misc x_refsource_misc
https://github.com/electron/electron/pull/50962
X_Refsource_Misc x_refsource_misc
https://github.com/electron/electron/pull/50963
X_Refsource_Misc x_refsource_misc
https://github.com/electron/electron/pull/50964

Scores

CVSS v3 5.4
EPSS 0.0036
EPSS Percentile 28.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-284
Status published
Products (4)
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
Published Aug 05, 2026
Tracked Since Aug 06, 2026