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Vulnerability · Published Apr 4, 2026 · Assigned by GitHub_M

CVE-2026-34780Electron: Context Isolation bypass via contextBridge VideoFrame transfer

High 8.4

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 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.4High
Exploit odds (30 days)0.3%top 73.4% 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. From versions 39.0.0-alpha.1 to before 39.8.0, 40.0.0-alpha.1 to before 40.7.0, and 41.0.0-alpha.1 to before 41.0.0-beta.8, apps that pass VideoFrame objects (from the WebCodecs API) across the contextBridge are vulnerable to a context isolation bypass. An attacker who can execute JavaScript in the main world (for example, via XSS) can use a bridged VideoFrame to gain access to the isolated world, including any Node.js APIs exposed to the preload script. Apps are only affected if a preload script returns, resolves, or passes a VideoFrame object to the main world via contextBridge.exposeInMainWorld(). Apps that do not bridge VideoFrame objects are not affected. This issue has been patched in versions 39.8.0, 40.7.0, and 41.0.0-beta.8.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
npmelectron39.8.0GHSA-jfqg-hf23-qpw2
npmelectron40.7.0GHSA-jfqg-hf23-qpw2
npmelectron41.0.0-beta.8GHSA-jfqg-hf23-qpw2

Affected products (as reported)

VendorProductVersions
electron electron >= 39.0.0-alpha.1, < 39.8.0>= 40.0.0-alpha.1, < 40.7.0>= 41.0.0-alpha.1, < 41.0.0-beta.8

Weakness: CWE-668, CWE-1188, CWE-501 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

References