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GHSA-4f78-qhmw-8j8m

Electron: DevTools JavaScript Injection via Unsanitized Dock State Parameter

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-70609

Packages

EcosystemPackageAffectedFixed in
npm electron < 39.8.7 39.8.7
npm electron >= 40.0.0-alpha.1, < 40.9.0 40.9.0
npm electron >= 41.0.0-alpha.1, < 41.2.0 41.2.0
npm electron >= 42.0.0-alpha.1, < 42.0.0-beta.1 42.0.0-beta.1

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact The `mode` option of `webContents.openDevTools()` was not sanitized before use by the DevTools frontend. If an attacker can influence this value, script under their control may run in the DevTools context, which in unsandboxed configurations has access to Node.js. Apps are only affected if untrusted input can reach the `mode` argument of `openDevTools()`, or if untrusted content can call `openDevTools()` on a `<webview>` it embeds. Apps that only ever pass a fixed dock mode are not affected. ### Workarounds Only pass fixed, allowlisted values (`right`, `bottom`, `undocked`, `detach`) as the DevTools `mode`, and do not expose `openDevTools` to untrusted content. ### Fixed Versions * `42.0.0-beta.1` * `41.2.0` * `40.9.0` * `39.8.7` ### For more information If you have any questions or comments about this advisory, email Electron at [[email protected]](mailto:[email protected])

References

External links from the advisory. They lead to third-party sites.