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CVE-2026-102674 — Vulnerability in electron — CVE Details

HIGH

Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions

Published September 29, 2026Updated September 29, 2026Source: osv

Summary

### Impact Windows opened from a sandboxed top-level document did not inherit that document's HTML `sandbox` restrictions, so content that was meant to run sandboxed could open a window with the app's full origin. GHSA-hq2x-r82h-9wj4 covers the same issue for sandboxed iframes. Apps are only affected if they render untrusted content in a sandboxed top-level document that allows popups. Apps that deny popups from untrusted content with `setWindowOpenHandler` are not affected. ### Workarounds Return `{ action: 'deny' }` from `setWindowOpenHandler` for windows opened by untrusted content. ### Fixed Versions * `44.0.0-beta.5` * `43.4.1` * `42.9.2` * `41.10.6` ### For more information If you have any questions or comments about this advisory, email us at [security@electronjs.org](mailto:security@electronjs.org)

Advisory Timeline

  • First published September 29, 2026 (13 days ago).
  • Last revised September 29, 2026 — 0 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

npm
Update electron to 41.10.6 or later
npm install electron@41.10.6
npm
Update electron to 44.0.0-beta.5 or later
npm install electron@44.0.0-beta.5
npm
Update electron to 43.4.1 or later
npm install electron@43.4.1
npm
Update electron to 42.9.2 or later
npm install electron@42.9.2

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (4)

Affects 1 ecosystem: npm (1).

PackageEcosystemAffectedFixed In
electron
npm
All versions41.10.6
electron
npm
All versions44.0.0-beta.5
electron
npm
All versions43.4.1
electron
npm
All versions42.9.2

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.2 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

References

Frequently Asked Questions

What is CVE-2026-102674?
Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.2/10).
How do I check if my project is affected by CVE-2026-102674?
CVE-2026-102674 affects electron. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-102674 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
8.2

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-gr2m-v5gq-v685

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