CVE-2026-70601
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 3.1
- 7.5
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N - EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 20% of CVEs (scores of 2026-10-25)
- CWE
- CWE-693
- Published
- Modified
- Record from
- the NVD, synced
Affected
- electronjs:electron
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-h7rp-cf8h-j98x | npm | electron | <39.8.9 | 39.8.9 |
| GHSA-h7rp-cf8h-j98x | npm | electron | >=40.0.0-alpha.1 <40.9.2 | 40.9.2 |
| GHSA-h7rp-cf8h-j98x | npm | electron | >=41.0.0-alpha.1 <41.2.2 | 41.2.2 |
| GHSA-h7rp-cf8h-j98x | npm | electron | >=42.0.0-alpha.1 <42.0.0-beta.5 | 42.0.0-beta.5 |