Vulnerability · Published Aug 5, 2026 · Assigned by GitHub_M

CVE-2026-70601Electron: Context isolation bypass via Function.prototype.bind hijack

High 7.5

In plain English

A high-severity security flaw in electron from electron. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.3%top 78.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	electron	39.8.9	GHSA-h7rp-cf8h-j98x
npm	electron	40.9.2	GHSA-h7rp-cf8h-j98x
npm	electron	41.2.2	GHSA-h7rp-cf8h-j98x
npm	electron	42.0.0-beta.5	GHSA-h7rp-cf8h-j98x

Affected products (as reported)

Vendor	Product	Versions
electron	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

Weakness: CWE-693 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N

References

https://github.com/electron/electron/security/advisories/GHSA-h7rp-cf8h-j98x x_refsource_CONFIRM