CVE-2026-34769 Electron: Renderer command-line switch injection via undocumented commandLineSwitches webPreference
Attackers can inject command-line switches to disable sandboxing if apps spread untrusted input into webPreferences.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-34769?
CVE-2026-34769 is a high-severity vulnerability in Electronjs Electron, published on 3 Apr 2026. It can only be exploited from the same machine or local network, 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 versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, an undocumented commandLineSwitches webPreference allowed arbitrary switches to be appended to the renderer process command line. Apps that construct webPreferences by spreading untrusted configuration objects may inadvertently allow an attacker to inject switches that disable renderer sandboxing or web security controls. Apps are only affected if they construct webPreferences from external or untrusted input without an allowlist. Apps that use a fixed, hardcoded webPreferences object are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.
Which versions are affected by CVE-2026-34769?
8 open source packages ship an affected version, including electron. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
electron npm | All versions | 38.8.6 |
electron npm | All versions | 38.8.6 |
electron npm | From 39.0.0-alpha.1 | 39.8.0 |
electron npm | From 39.0.0-alpha.1 | 39.8.0 |
electron npm | From 40.0.0-alpha.1 | 40.7.0 |
electron npm | From 40.0.0-alpha.1 | 40.7.0 |
2 more packages
electron npm | From 41.0.0-alpha.1 | 41.0.0-beta.8 |
electron npm | From 41.0.0-alpha.1 | 41.0.0-beta.8 |
Products include Electronjs Electron.
How do I fix CVE-2026-34769?
Upgrade electron to a fixed version for your release line: 38.8.6, 39.8.0, 40.7.0 or 41.0.0-beta.8.
Is CVE-2026-34769 being exploited?
There is no known exploitation of CVE-2026-34769 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-9wfr-w7mm-pc7f.