CVE-2026-70608Electron: Sandboxed iframe can bypass the allow-popups restriction via the OpenURL navigation path
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
Electron 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.
- CVSS
- 7.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-693, CWE-1021
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
electron electron electron:electron (from the name) | before 39.8.10; from 40.0.0-alpha.1, < 41.10.3; from 42.0.0-alpha.1, < 42.0.1 | CNA record |
electronjs electron electronjs:electron | before 39.8.8; from 40.0.0 before 41.10.3; from 42.0.0 before 42.0.1 | NVD |
References
- https://github.com/electron/electron/security/advisories/GHSA-9f4c-93c8-jc8gx-refsource-confirm, vendor-advisory
- https://github.com/electron/electron/pull/51437x-refsource-misc, issue-tracking, patch
- https://github.com/electron/electron/pull/51438x-refsource-misc, issue-tracking, patch
- https://github.com/electron/electron/pull/51439x-refsource-misc, issue-tracking, patch
- https://github.com/electron/electron/commit/3ff23c52ab364a0afc6ab5bd7851291d3159de57x-refsource-misc, patch
- https://github.com/electron/electron/commit/57cbe329c4ae8aab5ac5ebdcb588adc9a11de0d3x-refsource-misc, patch
- https://github.com/electron/electron/commit/68cf8b7d9122260f6b534a69a82c701a56cf159fx-refsource-misc, patch
- https://github.com/electron/electron/releases/tag/v39.8.10x-refsource-misc, release-notes
- https://github.com/electron/electron/releases/tag/v41.10.3x-refsource-misc, release-notes
- https://github.com/electron/electron/releases/tag/v42.0.1x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.