GHSA-xj5x-m3f3-5x3h
Electron: Service worker can spoof executeJavaScript IPC replies
At a glance
- Published
- Updated
- CVE
- CVE-2026-34778
- CVSS_V3
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
Description
### Impact A service worker running in a session could spoof reply messages on the internal IPC channel used by `webContents.executeJavaScript()` and related methods, causing the main-process promise to resolve with attacker-controlled data. Apps are only affected if they have service workers registered and use the result of `webContents.executeJavaScript()` (or `webFrameMain.executeJavaScript()`) in security-sensitive decisions. ### Workarounds Do not trust the return value of `webContents.executeJavaScript()` for security decisions. Use dedicated, validated IPC channels for security-relevant communication with renderers. ### Fixed Versions * `41.0.0` * `40.8.1` * `39.8.1` * `38.8.6` ### For more information If there are any questions or comments about this advisory, please email [security@electronjs.org](mailto:security@electronjs.org)
Affected packages
| Package | Versions |
|---|---|
| npm · electron | introduced 0, fixed 38.8.6 |
| npm · electron | introduced 39.0.0-alpha.1, fixed 39.8.1 |
| npm · electron | introduced 40.0.0-alpha.1, fixed 40.8.1 |
| npm · electron | introduced 41.0.0-alpha.1, fixed 41.0.0 |
References
- https://github.com/electron/electron/security/advisories/GHSA-xj5x-m3f3-5x3h WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-34778 ADVISORY
- https://github.com/electron/electron PACKAGE
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |