CVE-2026-102677 Electron: Sandboxed preload code cache can be poisoned by a compromised renderer
A compromised renderer can poison the sandboxed preload code cache, allowing execution of arbitrary code in the privileged preload context.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-102677?
CVE-2026-102677 is a high-severity code injection vulnerability in Electronjs Electron, published on 29 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From 42.3.3 until 42.10.0, 43.5.0, and 44.0.0-beta.6, Electron's sandboxed preload code cache did not verify that a cached entry matched the preload it was served for. A compromised renderer could write attacker-controlled cache data and cause Electron to reuse it for a later load, executing the renderer's code in the more privileged preload context. The issue affects applications that load untrusted content. This issue is fixed in versions 42.10.0, 43.5.0, and 44.0.0-beta.6.
Which versions are affected by CVE-2026-102677?
6 open source packages ship an affected version, including electron. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
electron npm | From 42.3.3 | 42.10.0 |
electron npm | From 42.3.3 | 42.10.0 |
electron npm | From 43.0.0-beta.1 | 43.5.0 |
electron npm | From 43.0.0-beta.1 | 43.5.0 |
electron npm | From 44.0.0-alpha.1 | 44.0.0-beta.6 |
electron npm | From 44.0.0-alpha.1 | 44.0.0-beta.6 |
Products include Electronjs Electron.
How do I fix CVE-2026-102677?
Upgrade electron to a fixed version for your release line: 42.10.0, 43.5.0 or 44.0.0-beta.6.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-102677 being exploited?
There is no known exploitation of CVE-2026-102677 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-qmv3-fv6v-rmhq.