CVE-2026-70600

Electron: Cross-origin iframe can position native autofill popup

State: Published
Severity: 3.1 Low
Published: Aug 5, 2026
Updated: Aug 6, 2026
Reserved: Aug 4, 2026

Description

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, the native autofill popup could be positioned by a cross-origin iframe outside that iframe's bounds, over the embedding page's UI, enabling clickjacking or spoofing of trusted UI. Apps are only affected if they embed untrusted content in iframes within windows that also display trusted UI. Apps that do not embed untrusted third-party content are not affected. This issue is fixed in versions 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.

Scores

CVSS	Score	Vector	Source
3.1	3.1 Low	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N	GitHub_M

Weaknesses

CWE-1021 Improper Restriction of Rendered UI Layers or Frames

Affected Products

Product	Versions
electronelectron	< 39.8.8Affected >= 40.0.0-alpha.1, < 40.9.0Affected >= 41.0.0-alpha.1, < 41.2.1Affected >= 42.0.0-alpha.1, < 42.0.0-beta.3Affected

References

https://github.com/electron/electron/security/advisories/GHSA-x8rc-wpg4-grpf

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