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.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required High

Scope Changed

Confidentiality Impact High

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
electron electron affected
Version Status Constraints
< 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 —

No data.

No data.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-m55f-7gqj-fr98 Electron: Extension tab APIs operate across session boundaries
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/electron/electron/security/advisories/GHSA-m55f-7gqj-fr98 cve-icon
History

Wed, 05 Aug 2026 18:15:00 +0000

Type Values Removed Values Added
First Time appeared Electron
Electron electron
Vendors & Products Electron
Electron electron

Wed, 05 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 05 Aug 2026 16:15:00 +0000

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, 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.
Title Electron: Extension tab APIs operate across session boundaries
Weaknesses CWE-284
References
Metrics cvssV3_1

{'score': 6.6, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-05T16:13:06.513Z

Reserved: 2026-08-04T19:50:27.328Z

Link: CVE-2026-70602

cve-icon Vulnrichment

Updated: 2026-08-05T16:13:02.584Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-05T18:00:09Z

Weaknesses