Electron: Context isolation bypass via Function.prototype.bind hijack
Priority LOW 33CWE-693Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-693.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00285 21st percentileScored 2026-11-07
Fix Fixed electron (electron): 39.8.9, 40.9.2, 41.2.2 +1electron (npm): 39.8.9, 40.9.2, 41.2.2 +1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| electron | electron | before 39.8.9; 40.0.0-alpha.1 to before 40.9.2; 41.0.0-alpha.1 to before 41.2.2; 42.0.0-alpha.1 to before 42.0.0-beta.5 | 39.8.9, 40.9.2, 41.2.2, 42.0.0-beta.5 | Patch available | CNA |
| — | electron (npm) | before 39.8.9 | 39.8.9 | Patch available | GHSA-h7rp-cf8h-j98x |
| — | electron (npm) | 40.0.0-alpha.1 to before 40.9.2 | 40.9.2 | Patch available | GHSA-h7rp-cf8h-j98x |
| — | electron (npm) | 41.0.0-alpha.1 to before 41.2.2 | 41.2.2 | Patch available | GHSA-h7rp-cf8h-j98x |
| — | electron (npm) | 42.0.0-alpha.1 to before 42.0.0-beta.5 | 42.0.0-beta.5 | Patch available | GHSA-h7rp-cf8h-j98x |
- electron Vendorelectron Affected before 39.8.9; 40.0.0-alpha.1 to before 40.9.2; 41.0.0-alpha.1 to before 41.2.2; 42.0.0-alpha.1 to before 42.0.0-beta.5 Fixed in 39.8.9, 40.9.2, 41.2.2, 42.0.0-beta.5 Patch available CNA
- electron (npm) Vendor— Affected before 39.8.9 Fixed in 39.8.9 Patch available GHSA-h7rp-cf8h-j98x
- electron (npm) Vendor— Affected 40.0.0-alpha.1 to before 40.9.2 Fixed in 40.9.2 Patch available GHSA-h7rp-cf8h-j98x
- electron (npm) Vendor— Affected 41.0.0-alpha.1 to before 41.2.2 Fixed in 41.2.2 Patch available GHSA-h7rp-cf8h-j98x
- electron (npm) Vendor— Affected 42.0.0-alpha.1 to before 42.0.0-beta.5 Fixed in 42.0.0-beta.5 Patch available GHSA-h7rp-cf8h-j98x
CPE configurations NVD · 11
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:* | before 39.8.9; 40.0.0 to before 40.9.2; 41.0.0 to before 41.2.2 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:42.0.0:alpha1:*:*:*:node.js:*:* | 42.0.0 alpha1 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:42.0.0:alpha2:*:*:*:node.js:*:* | 42.0.0 alpha2 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:42.0.0:alpha3:*:*:*:node.js:*:* | 42.0.0 alpha3 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:42.0.0:alpha4:*:*:*:node.js:*:* | 42.0.0 alpha4 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:42.0.0:alpha5:*:*:*:node.js:*:* | 42.0.0 alpha5 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:42.0.0:alpha6:*:*:*:node.js:*:* | 42.0.0 alpha6 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:42.0.0:beta1:*:*:*:node.js:*:* | 42.0.0 beta1 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:42.0.0:beta2:*:*:*:node.js:*:* | 42.0.0 beta2 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:42.0.0:beta3:*:*:*:node.js:*:* | 42.0.0 beta3 | Vulnerable | Electronjs |
- cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:* Versions before 39.8.9; 40.0.0 to before 40.9.2; 41.0.0 to before 41.2.2 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:42.0.0:alpha1:*:*:*:node.js:*:* Versions 42.0.0 alpha1 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:42.0.0:alpha2:*:*:*:node.js:*:* Versions 42.0.0 alpha2 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:42.0.0:alpha3:*:*:*:node.js:*:* Versions 42.0.0 alpha3 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:42.0.0:alpha4:*:*:*:node.js:*:* Versions 42.0.0 alpha4 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:42.0.0:alpha5:*:*:*:node.js:*:* Versions 42.0.0 alpha5 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:42.0.0:alpha6:*:*:*:node.js:*:* Versions 42.0.0 alpha6 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:42.0.0:beta1:*:*:*:node.js:*:* Versions 42.0.0 beta1 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:42.0.0:beta2:*:*:*:node.js:*:* Versions 42.0.0 beta2 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:42.0.0:beta3:*:*:*:node.js:*:* Versions 42.0.0 beta3 Vulnerable ·Electronjs
Show 1 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:electronjs:electron:42.0.0:beta4:*:*:*:node.js:*:* | 42.0.0 beta4 | Vulnerable | Electronjs |
- cpe:2.3:a:electronjs:electron:42.0.0:beta4:*:*:*:node.js:*:* Versions 42.0.0 beta4 Vulnerable ·Electronjs
Remediation
- Fix · CNA electron (electron) Fixed in 39.8.9, 40.9.2, 41.2.2, 42.0.0-beta.5
- Fix · GHSA-h7rp-cf8h-j98x electron (npm) Fixed in 39.8.9 Advisory →
- Fix · GHSA-h7rp-cf8h-j98x electron (npm) Fixed in 40.9.2 Advisory →
- Fix · GHSA-h7rp-cf8h-j98x electron (npm) Fixed in 41.2.2 Advisory →
- Fix · GHSA-h7rp-cf8h-j98x electron (npm) Fixed in 42.0.0-beta.5 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-70601
- 2026-10-03 Alias added: GHSA-h7rp-cf8h-j98x
References
More electron vulnerabilities
- TI-2026-39496 Information disclosure in electron-builder CVSS 4.0HIGH 8.2
- TI-2024-26621 Code Signing Bypass on Windows in electron-updater < 6.3.0-alpha.6 CVSS 3.1HIGH 7.5
- TI-2023-09452 Content-Secrity-Policy disabling eval not applied consistently in renderers with sandbox disabled in Electron CVSS 3.1CRITICAL 9.8
- TI-2026-39157 Electron: Buffer performs incorrect byte length calculations resulting in heap buffer under/overflow CVSS 4.0CRITICAL 9.3
- TI-2017-09308 GitHub Electron before 1.6.8 allows remote command execution because of a nodeIntegration… CVSS 3.0HIGH 8.1
- TI-2022-11788 Exposure of Resource to Wrong Sphere in Electron CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-70601 · CVE Program
- CVE-2026-70601 · NVD
- FIRST EPSS
- GHSA-h7rp-cf8h-j98x · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences