High 8.2Published Sep 29, 2026

CVE-2026-102673Electron drops inherited HTML sandbox restrictions for popups opened through OpenURLFromTab

Updated under an hour ago (Oct 28, 2026, 3:20 AM ET)

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It affects electron and 1 other product. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.15%, higher than 3% of scored CVEs.

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Exploited in the last 30 days

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 41.10.4, 42.5.2, and 43.0.0, popups opened from a sandboxed iframe through Electron's OpenURLFromTab navigation path, including links using target="_blank" or a middle-click, did not receive the inherited HTML sandbox restrictions. An untrusted iframe using the allow-scripts allow-popups configuration could therefore open a popup with the embedding application's full origin, exposing that origin's cookies, storage, and same-origin scripting capabilities. Applications that do not embed untrusted content in sandboxed iframes are not affected. This issue is fixed in versions 41.10.4, 42.5.2, and 43.0.0.

CVSS: 8.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Weakness (CWE): CWE-346, CWE-693
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.15% (percentile 3)
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Sep 30, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

electron electron electron:electron (from the name)	before 41.10.4; from 42.0.0-alpha.1, < 42.5.2; from 43.0.0-alpha.1, < 43.0.0	CNA record
electronjs electron electronjs:electron	before 39.8.8; from 40.0.0 before 40.9.0; from 41.0.0 through 41.2.1; 42.0.0; 42.0.0; 42.0.0; 42.0.0; 42.0.0; and 3 more ranges	NVD

References

References

https://github.com/electron/electron/security/advisories/GHSA-hq2x-r82h-9wj4	x-refsource-confirm, vendor-advisory
https://github.com/electron/electron/pull/52133	x-refsource-misc, issue-tracking, patch
https://github.com/electron/electron/commit/7ea14d5f55ecb11a30447701ddca16b3feee0bba	x-refsource-misc, patch
https://github.com/electron/electron/commit/e26b2640e7795c42bfb111b76009cbb4327c9a69	x-refsource-misc, patch
https://github.com/electron/electron/commit/ebe1165ee2b05c203c26dd2244ef1c5b9b1c04da	x-refsource-misc, patch
https://github.com/electron/electron/releases/tag/v41.10.4	x-refsource-misc, issue-tracking, patch
https://github.com/electron/electron/releases/tag/v42.5.2	x-refsource-misc, release-notes
https://github.com/electron/electron/releases/tag/v43.0.0	x-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.