Vulnerability · Published Apr 3, 2026 · Assigned by GitHub_M

CVE-2026-34777Electron: Incorrect origin passed to permission request handler for iframe requests

Medium 5.4

In plain English

A medium-severity security flaw in electron from electron. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.1%top 97.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0, when an iframe requests fullscreen, pointerLock, keyboardLock, openExternal, or media permissions, the origin passed to session.setPermissionRequestHandler() was the top-level page's origin rather than the requesting iframe's origin. Apps that grant permissions based on the origin parameter or webContents.getURL() may inadvertently grant permissions to embedded third-party content. The correct requesting URL remains available via details.requestingUrl. Apps that already check details.requestingUrl are not affected. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	electron	38.8.6	GHSA-r5p7-gp4j-qhrx
npm	electron	39.8.1	GHSA-r5p7-gp4j-qhrx
npm	electron	40.8.1	GHSA-r5p7-gp4j-qhrx
npm	electron	41.0.0	GHSA-r5p7-gp4j-qhrx

Affected products (as reported)

Vendor	Product	Versions
electron	electron	< 38.8.6>= 39.0.0-alpha.1, < 39.8.1>= 40.0.0-alpha.1, < 40.8.1>= 41.0.0-alpha.1, < 41.0.0

Weakness: CWE-346 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

References

https://github.com/electron/electron/security/advisories/GHSA-r5p7-gp4j-qhrx x_refsource_CONFIRM