CVE-2026-70612

mediumpriority · track · 0EPSS 0.004 · 36 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.43% (36th) EPSS

CVSS 5.4 · medium

Is it mine?

12 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-24

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.

cvss

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

5.4

010

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

v3.15.4mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:Nsecondary · ENISA EU

v3.15.4mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:Nsecondary · security-advisories@github.comexploitability 2.2 · impact 2.7

v3.15.4mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:Nsecondary · OSV

v3.15mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/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-p2rr-rvmm-c5fpElectron: Sandboxed iframes can launch external protocol handlers2026-08-05ghsa · osvUS
### Impact 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's sandbox state was also not made available to the app's permission handlers. Apps are only affected if they render untrusted content in sandboxed iframes and grant the `openExternal` permission (granted by default when no `setPermissionRequestHandler` is installed). Apps whose permission handler denies `openExternal` for untrusted content are not affected. ### Workarounds Install a `setPermissionRequestHandler` that denies the `openExternal` permission for untrusted content. ### 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 (40)

External citations — patches, advisories, analysis.

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