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CVE-2026-70602— Electron: Extension tab APIs operate across session boundaries

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，该漏洞源于扩展标签页和脚本API未限定在扩展自身会话中，可能导致恶意或受损扩展跨会话导航、执行脚本和读取窗口。

CVSS 6.6 · Medium EPSS 0.26% · P16

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-2026-70602

Vulnerability Information
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Vulnerability Title
Electron: Extension tab APIs operate across session boundaries
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, extension tab and scripting APIs were not scoped to the extension's own session. A malicious or compromised extension loaded into one session could navigate, script, and read from windows belonging to a different session. Apps are only affected if they load Chrome extensions via session.loadExtension and rely on separate sessions to isolate that extension from other content. This issue is fixed in versions 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:H/UI:N/S:C/C:H/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，该漏洞源于扩展标签页和脚本API未限定在扩展自身会话中，可能导致恶意或受损扩展跨会话导航、执行脚本和读取窗口。
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-2026-70602

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III. Intelligence Information for CVE-2026-70602

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Vendor Advisories for CVE-2026-70602 (1)

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-2026-70597 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-2026-70612 5.4 MEDIUM Electron: Sandboxed iframes can launch external protocol handlers
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-2026-70602

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