CVE-2026-70601 json
Electron: Context isolation bypass via Function.prototype.bind hijack
published 2026-08-05 3 mo ago modified 2026-10-08 31 d ago also GHSA-h7rp-cf8h-j98x , EUVD-2026-53433
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
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.
Patch / fix
- npm electron 39.8.9, 40.9.2, 41.2.2, 42.0.0-beta.5
- electronjs electron 39.8.9, 40.9.2, 41.2.2
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | electron | <39.8.9 >=40.0.0-alpha.1, <40.9.2 >=41.0.0-alpha.1, <41.2.2 >=42.0.0-alpha.1, <42.0.0-beta.5 |
39.8.9 40.9.2 41.2.2 42.0.0-beta.5 |
Affected products
- electron electron
Classification
- Weakness
-
- CWE-693 Protection Mechanism Failure
References
-
github.com
/electron/electron/security/advisories/GHSA-h7rp-cf8h-j98x
web, vendor-advisory
-
github.com
/electron/electron
package
Sources
- CVE List CVE-2026-70601
- GitHub Advisory GHSA-h7rp-cf8h-j98x
- NVD CVE-2026-70601
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.