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, 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.
Affected products
electronjs: electron
References10
- github.com/electron/electron/security/advisories/GHSA-p2rr-rvmm… Vendor AdvisoryMitigation
- github.com/electron/electron/commit/08b9d0a220e267d1a2402a44bdd… Patch
- github.com/electron/electron/commit/2764e4c35168855f61487605182… Patch
- github.com/electron/electron/commit/477dcf7afc6550715f9ec5e6f39… Patch
- github.com/electron/electron/commit/c39e3d5687d57434c8d5fe814c5… Patch
- github.com/electron/electron/pull/50961 Issue TrackingPatch
- github.com/electron/electron/pull/50962 Issue TrackingPatch
- github.com/electron/electron/pull/50963 Issue TrackingPatch
- github.com/electron/electron/pull/50964 Issue TrackingPatch
- github.com/electron/electron/releases/tag/v39.8.8 Release Notes
Metrics
- CVSS 3.1
-
5.4
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 38 · as of 13 November 2026
- CWE
- CWE-284
Could this be exploited in your environment?
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