Electron: Sandboxed iframe can bypass the allow-popups restriction via the OpenURL navigation path

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-70608
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-05 18:17:15 UTC
Updated2026-08-05 19:17:40 UTC
DescriptionElectron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 41.10.3, and 42.0.1, a sandboxed iframe without the allow-popups keyword could still open a new window or trigger setWindowOpenHandler with no user interaction because new-window navigations taking the OpenURL path did not apply the iframe sandbox popup restriction. Apps that embed untrusted content in sandboxed iframes and rely on the absence of allow-popups to prevent window creation are affected, while apps that deny window creation in setWindowOpenHandler or do not embed untrusted content in sandboxed iframes are not affected. This issue is fixed in 39.8.10, 41.10.3, and 42.0.1.

Risk And Classification

Primary CVSS: v3.1 7.2 HIGH from [email protected]

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

Problem Types: CWE-693 | CWE-1021 | CWE-693 CWE-693: Protection Mechanism Failure | CWE-1021 CWE-1021: Improper Restriction of Rendered UI Layers or Frames

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Electron Electron affected < 39.8.10 Not specified
CNA Electron Electron affected >= 40.0.0-alpha.1, < 41.10.3 Not specified
CNA Electron Electron affected >= 42.0.0-alpha.1, < 42.0.1 Not specified

References

ReferenceSourceLinkTags
github.com/electron/electron/pull/51437 [email protected] github.com
github.com/electron/electron/pull/51438 [email protected] github.com
github.com/electron/electron/security/advisories/GHSA-9f4c-93c8-jc8g [email protected] github.com
github.com/electron/electron/commit/3ff23c52ab364a0afc6ab5bd7851291d3159... [email protected] github.com
github.com/electron/electron/releases/tag/v42.0.1 [email protected] github.com
github.com/electron/electron/pull/51439 [email protected] github.com
github.com/electron/electron/commit/57cbe329c4ae8aab5ac5ebdcb588adc9a11d... [email protected] github.com
github.com/electron/electron/releases/tag/v41.10.3 [email protected] github.com
github.com/electron/electron/commit/68cf8b7d9122260f6b534a69a82c701a56cf... [email protected] github.com
github.com/electron/electron/releases/tag/v39.8.10 [email protected] github.com
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