CVE-2026-102673 Electron drops inherited HTML sandbox restrictions for popups opened through OpenURLFromTab
Attackers can bypass sandbox restrictions in Electron popups to access sensitive origin data and execute scripts if untrusted content is embedded.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-102673?
CVE-2026-102673 is a high-severity vulnerability in Electronjs Electron, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-102673?
6 open source packages ship an affected version, including electron. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
electron npm | All versions | 41.10.4 |
electron npm | All versions | 41.10.4 |
electron npm | From 42.0.0-alpha.1 | 42.5.2 |
electron npm | From 42.0.0-alpha.1 | 42.5.2 |
electron npm | From 43.0.0-alpha.1 | 43.0.0 |
electron npm | From 43.0.0-alpha.1 | 43.0.0 |
Products include Electronjs Electron.
How do I fix CVE-2026-102673?
Upgrade electron to a fixed version for your release line: 41.10.4, 42.5.2 or 43.0.0.
Is CVE-2026-102673 being exploited?
There is no known exploitation of CVE-2026-102673 in the wild and no public exploit code.
Other vulnerabilities in Electronjs Electron
- CVE-2017-16151 Chromium Remote Code Execution in electron
- CVE-2018-1000118 Electron protocol handler browser vulnerable to Command Injection
- CVE-2026-34780 Electron: Context Isolation bypass via contextBridge VideoFrame transfer
- CVE-2026-102676 Electron: <webview> can enable Node.js integration in Web Workers despite embedder restrictions
- CVE-2026-102674 Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions
Sources
Also known as GHSA-hq2x-r82h-9wj4.