CVE-2026-70601
CVE-2026-70601 · Electron: Context isolation bypass via Function.prototype.bind hijack
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 7.5 · High · EPSS 0.3% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
electron
- Versions
- < 39.8.9: Affected
- >= 40.0.0-alpha.1, < 40.9.2: Affected
- >= 41.0.0-alpha.1, < 41.2.2: Affected
- >= 42.0.0-alpha.1, < 42.0.0-beta.5: Affected
No fix published
electron npm
- Affected ranges
- SEMVER: < 39.8.9
Update to 39.8.9
electron npm
- Affected ranges
- SEMVER: ≥ 40.0.0-alpha.1, < 40.9.2
Update to 40.9.2
electron npm
- Affected ranges
- SEMVER: ≥ 41.0.0-alpha.1, < 41.2.2
Update to 41.2.2
electron npm
- Affected ranges
- SEMVER: ≥ 42.0.0-alpha.1, < 42.0.0-beta.5
Update to 42.0.0-beta.5