CVE-2026-70599

mediumpriority · track · 0EPSS 0.002 · 9 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.19% (9th) EPSS

CVSS 5.9 · medium

Is it mine?

16 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-21

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1, serial-port and media permission checks made from an iframe passed the top-level frame origin to session.setPermissionCheckHandler instead of the requesting iframe origin. Origin-based handler logic could grant a cross-origin iframe device access intended only for the top-level origin. This issue is fixed in 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1.

cvss

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

5.9

010

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

v3.15.9mediumAV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · security-advisories@github.comexploitability 2.2 · impact 3.6

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · OSV

v3.15.4mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/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-346USCWE-346USCWE-346US

affected products (16)

Products and version ranges known to be affected.

Electron Electron≤ < 39.8.7enisa_euvdEU
Electron Electron40.0.0-alpha.1, → 40.9.0enisa_euvdEU
Electron Electron41.0.0-alpha.1, → 41.2.0enisa_euvdEU
Electron Electron42.0.0-alpha.1, → 42.0.0-beta.1enisa_euvdEU
Electron Electron≤ 39.8.7fstec_bduRU
Electron Electron40.0.0-alpha.1 → 40.9.0fstec_bduRU
Electron Electron41.0.0-alpha.1 → 41.2.0fstec_bduRU
Electron Electron42.0.0-alpha.1 → 42.0.0-beta.1fstec_bduRU
electronjs electron< 39.8.7nvdUScpe: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< 39.8.7osvUSpkg:npm/electron
npm electron40.0.0-alpha.1 → 40.9.0osvUSpkg:npm/electron
npm electron41.0.0-alpha.1 → 41.2.0osvUSpkg:npm/electron
npm electron42.0.0-alpha.1 → 42.0.0-beta.1osvUSpkg:npm/electron

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-9pf5-hg6p-4pwpElectron: Permission Check Handler Receives Main Frame Origin Instead of Requesting Iframe Origin2026-08-05ghsa · osvUS
### Impact For serial-port and media (camera / microphone) permission checks made from an iframe, the `requestingOrigin` passed to `session.setPermissionCheckHandler` was the top-level frame's origin rather than the requesting frame's. Origin-based handler logic could therefore grant a cross-origin iframe device access intended only for the top-level origin. Apps are only affected if they use `setPermissionCheckHandler` with origin-based logic and embed cross-origin iframes with delegated device permissions. Apps that base the decision on `details.securityOrigin`, or that do not embed such iframes, are not affected. ### Workarounds Check `details.securityOrigin` instead of `requestingOrigin` for these permissions, or do not delegate device permissions to untrusted iframes. ### Fixed Versions * `42.0.0-beta.1` * `41.2.0` * `40.9.0` * `39.8.7` ### 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 (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd osv NVD CVE.org MITRE

published 2026-08-05modified 2026-10-08

references (7)

External citations — patches, advisories, analysis.

scry

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