Medium severity · published Sep 29, 2026
CVE-2026-102673
Electron drops inherited HTML sandbox restrictions for popups opened through OpenURLFromTab
6.1
CVSS
0.1%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
electron · electron
< 41.10.4; >= 42.0.0-alpha.1, < 42.5.2; >= 43.0.0-alpha.1, < 43.0.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-102673
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-102673
x_refsource_CONFIRM
https://github.com/electron/electron/security/advisories/GHSA-hq2x-r82h-9wj4
x_refsource_MISC
https://github.com/electron/electron/pull/52133
x_refsource_MISC
https://github.com/electron/electron/commit/7ea14d5f55ecb11a30447701ddca16b3feee0bba
x_refsource_MISC
https://github.com/electron/electron/commit/e26b2640e7795c42bfb111b76009cbb4327c9a69
x_refsource_MISC
https://github.com/electron/electron/commit/ebe1165ee2b05c203c26dd2244ef1c5b9b1c04da
x_refsource_MISC
https://github.com/electron/electron/releases/tag/v41.10.4
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