CVE-2026-102673highCWE-346CWE-693

CVE-2026-102673: high-severity vulnerability in electron

Electron drops inherited HTML sandbox restrictions for popups opened through OpenURLFromTab

Published · Updated

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.2epss 0.1%
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
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:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Affected products
electron · electron
Related CVEs — electron

In the same product, most dangerous first.

CVE-2020-26272MEDIUMElectron vulnerable to ID collision when routing IPC messages to renderers containing OOPIFsEPSS 1.7%CVE-2020-15174HIGHUnpreventable top-level navigation in ElectronEPSS 1.3%CVE-2020-4075MEDIUMArbitrary file read via window-open IPC in ElectronEPSS 1.2%CVE-2021-39184MEDIUMSandboxed renderers can obtain thumbnails of arbitrary files through the nativeImage APIEPSS 1.1%CVE-2022-29247LOWExposure of Resource to Wrong Sphere in ElectronEPSS 1.0%CVE-2020-4077HIGHContext isolation bypass via contextBridge in ElectronEPSS 1.0%
References
https://github.com/electron/electron/commit/7ea14d5f55ecb11a30447701ddca16b3feee0bbahttps://github.com/electron/electron/commit/e26b2640e7795c42bfb111b76009cbb4327c9a69https://github.com/electron/electron/commit/ebe1165ee2b05c203c26dd2244ef1c5b9b1c04dahttps://github.com/electron/electron/pull/52133https://github.com/electron/electron/releases/tag/v41.10.4https://github.com/electron/electron/releases/tag/v42.5.2https://github.com/electron/electron/releases/tag/v43.0.0https://github.com/electron/electron/security/advisories/GHSA-hq2x-r82h-9wj4