CVE-2026-70604
Description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 40.9.3, 41.4.0, and 42.0.0, a custom scheme registered with supportFetchAPI: true but without corsEnabled: true was not subject to CORS enforcement. A page loaded from a remote origin could therefore fetch() or XMLHttpRequest that scheme cross-origin and read the full response body, rather than the read being blocked. Apps that serve sensitive data from such a scheme and load remote or untrusted content in a renderer are affected. This issue is fixed in versions 39.8.10, 40.9.3, 41.4.0, and 42.0.0.
AI Insight
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
electronnpm | >= 42.0.0-alpha.1, < 42.0.0 | 42.0.0 |
electronnpm | >= 41.0.0-alpha.1, < 41.4.0 | 41.4.0 |
electronnpm | >= 40.0.0-alpha.1, < 40.9.3 | 40.9.3 |
electronnpm | < 39.8.10 | 39.8.10 |
Affected products
1- Range: <39.8.10, <40.9.3, <41.4.0, <42.0.0
Patches
Vulnerability mechanics
References
2News mentions
1- Electron Framework: 16 Vulnerabilities Disclosed, Including Sandbox Bypass and Prototype PollutionVypr Intelligence · Aug 5, 2026