CVE-2026-70602

mediumpriority · track · 0EPSS 0.003 · 16 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.26% (16th) EPSS

CVSS 6.6 · medium

Is it mine?

12 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-23

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.

cvss

Technical severity, 0–10. One row per scoring source.

6.6

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.6mediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:Nsecondary · ENISA EU

v3.16.6mediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:Nsecondary · security-advisories@github.comexploitability 1.3 · impact 4.7

v3.16.6mediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:Nsecondary · OSV

v3.16.1mediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-284USCWE-284US

affected products (12)

Products and version ranges known to be affected.

Electron Electron≤ < 39.8.8enisa_euvdEU
Electron Electron40.0.0-alpha.1, → 40.9.0enisa_euvdEU
Electron Electron41.0.0-alpha.1, → 41.2.1enisa_euvdEU
Electron Electron42.0.0-alpha.1, → 42.0.0-beta.3enisa_euvdEU
electronjs electron< 39.8.8nvdUScpe:2.3:a:electronjs:electron:*:*:*:*:*:*:*:*
electronjs electron40.0.0 → 40.9.0nvdUScpe:2.3:a:electronjs:electron:*:*:*:*:*:*:*:*
electronjs electron41.0.0 → 41.2.1nvdUScpe:2.3:a:electronjs:electron:*:*:*:*:*:*:*:*
electronjs electron= 42.0.0nvdUScpe:2.3:a:electronjs:electron:*:*:*:*:*:*:*:*
npm electron< 39.8.8osvUSpkg:npm/electron
npm electron40.0.0-alpha.1 → 40.9.0osvUSpkg:npm/electron
npm electron41.0.0-alpha.1 → 41.2.1osvUSpkg:npm/electron
npm electron42.0.0-alpha.1 → 42.0.0-beta.3osvUSpkg:npm/electron

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-m55f-7gqj-fr98Electron: Extension tab APIs operate across session boundaries2026-08-05ghsa · osvUS
### Impact 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. Apps that do not load extensions, or that use a single session, are not affected. ### Workarounds Only load extensions from sources you trust; do not rely on session separation alone to contain an extension. ### Fixed Versions * `42.0.0-beta.3` * `41.2.1` * `40.9.0` * `39.8.8` ### For more information If you have any questions or comments about this advisory, email Electron at [security@electronjs.org](mailto:security@electronjs.org)

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2026-08-05modified 2026-08-05

references (4)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan