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CVE-2026-70612— Electron: Sandboxed iframes can launch external protocol handlers

Quick assessment

Affected
electron electron
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Electron是Electron组织开源的一个跨平台的桌面应用开发框架。 Electron 39.8.8之前版本、40.9.0之前版本、41.2.1之前版本和42.0.0-beta.3之前版本存在权限许可和访问控制问题漏洞，该漏洞源于从Web内容打开外部协议URL时未考虑iframe沙箱限制，可能导致沙箱化的iframe启动操作系统注册的外部应用程序。

CVSS 5.4 · Medium EPSS 0.36% · P29

Affected Version Matrix 4

VendorProduct Version RangeStatus
electron electron < 39.8.8 affected
>= 40.0.0-alpha.1, < 40.9.0 affected
>= 41.0.0-alpha.1, < 41.2.1 affected
>= 42.0.0-alpha.1, < 42.0.0-beta.3 affected
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I. Basic Information for CVE-2026-70612

Vulnerability Information
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Vulnerability Title
Electron: Sandboxed iframes can launch external protocol handlers
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Electron 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Electron是Electron组织开源的一个跨平台的桌面应用开发框架。 Electron 39.8.8之前版本、40.9.0之前版本、41.2.1之前版本和42.0.0-beta.3之前版本存在权限许可和访问控制问题漏洞，该漏洞源于从Web内容打开外部协议URL时未考虑iframe沙箱限制，可能导致沙箱化的iframe启动操作系统注册的外部应用程序。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
electron electron < 39.8.8 -

II. Public POCs for CVE-2026-70612

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III. Intelligence Information for CVE-2026-70612

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Patches & Fixes for CVE-2026-70612 (8)

Vendor Advisories for CVE-2026-70612 (1)

Vendor Pages for CVE-2026-70612 (4)

Same Patch Batch · electron · 2026-08-05 · 16 CVEs total

CVE-2026-70601 7.5 HIGH Electron: Context isolation bypass via Function.prototype.bind hijack
CVE-2026-70604 7.4 HIGH Electron: Custom protocol with supportFetchAPI but not corsEnabled allows cross-origin rea
CVE-2026-70608 7.2 HIGH Electron: Sandboxed iframe can bypass the allow-popups restriction via the OpenURL navigat
CVE-2026-70611 6.9 MEDIUM Electron: DevTools embedder handler executes arbitrary files via shell open
CVE-2026-70602 6.6 MEDIUM Electron: Extension tab APIs operate across session boundaries
CVE-2026-70597 6.3 MEDIUM Electron: Parent process code-sign check is spoofable
CVE-2026-70603 6.0 MEDIUM Electron: shell.openPath path validation bypass via embedded null byte
CVE-2026-70605 5.9 MEDIUM Electron: HTTP redirect followed into local file loader
CVE-2026-70606 5.9 MEDIUM Electron: ProtocolResponse.url reuses the default session cache instead of the registering
CVE-2026-70599 5.9 MEDIUM Electron: Permission Check Handler Receives Main Frame Origin Instead of Requesting Iframe
CVE-2026-70609 5.7 MEDIUM Electron: DevTools JavaScript Injection via Unsanitized Dock State Parameter
CVE-2026-70610 5.4 MEDIUM Electron: contextBridge object copy honors prototype setters
CVE-2026-70607 5.3 MEDIUM Electron: window.open features string controls some window options considered privileged
CVE-2026-70598 3.9 LOW Electron: Off-screen rendering trusts GPU-supplied geometry over shared-memory size
CVE-2026-70600 3.1 LOW Electron: Cross-origin iframe can position native autofill popup

IV. Related Vulnerabilities

Same product: electron
Same vendor: electron
Same weakness: CWE-284

V. Comments for CVE-2026-70612

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