CVE-2026-70601 Electron: Context isolation bypass via Function.prototype.bind hijack
Attackers can bypass context isolation in Electron apps exposing Promise-returning functions, potentially gaining Node.js access and executing arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-70601?
CVE-2026-70601 is a high-severity vulnerability in Electronjs Electron, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.5, apps that expose Promise-returning functions to web content via contextBridge may be vulnerable to a context isolation bypass. Untrusted web content could obtain access to the isolated preload world and, through it, every capability the preload script has. In renderers without a sandbox, or with nodeIntegration enabled, this may escalate to Node.js access. Apps are affected if they expose Promise-returning functions via contextBridge, the standard pattern for wrapping ipcRenderer.invoke, in windows that load untrusted content. This issue is fixed in versions 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.5.
Weakness: CWE-693
Which versions are affected by CVE-2026-70601?
8 open source packages ship an affected version, including electron. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
electron npm | All versions | 39.8.9 |
electron npm | All versions | 39.8.9 |
electron npm | From 40.0.0-alpha.1 | 40.9.2 |
electron npm | From 40.0.0-alpha.1 | 40.9.2 |
electron npm | From 41.0.0-alpha.1 | 41.2.2 |
electron npm | From 41.0.0-alpha.1 | 41.2.2 |
2 more packages
electron npm | From 42.0.0-alpha.1 | 42.0.0-beta.5 |
electron npm | From 42.0.0-alpha.1 | 42.0.0-beta.5 |
Products include Electronjs Electron.
How do I fix CVE-2026-70601?
Upgrade electron to a fixed version for your release line: 39.8.9, 40.9.2, 41.2.2 or 42.0.0-beta.5.
Is CVE-2026-70601 being exploited?
There is no known exploitation of CVE-2026-70601 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-2026-102673 Electron drops inherited HTML sandbox restrictions for popups opened through OpenURLFromTab
Sources
Also known as GHSA-h7rp-cf8h-j98x.