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High severity7.4NVD Advisory· Published Aug 5, 2026· Updated Oct 8, 2026

CVE-2026-70604

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

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
electronnpm
>= 42.0.0-alpha.1, < 42.0.042.0.0
electronnpm
>= 41.0.0-alpha.1, < 41.4.041.4.0
electronnpm
>= 40.0.0-alpha.1, < 40.9.340.9.3
electronnpm
< 39.8.1039.8.10

Affected products

16
  • Electronjs/Electron15 versions
    cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:*+ 14 more
    • cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:*range: <39.8.10
    • cpe:2.3:a:electronjs:electron:42.0.0:alpha1:*:*:*:node.js:*:*
    • cpe:2.3:a:electronjs:electron:42.0.0:alpha2:*:*:*:node.js:*:*
    • cpe:2.3:a:electronjs:electron:42.0.0:alpha3:*:*:*:node.js:*:*
    • cpe:2.3:a:electronjs:electron:42.0.0:alpha4:*:*:*:node.js:*:*
    • cpe:2.3:a:electronjs:electron:42.0.0:alpha5:*:*:*:node.js:*:*
    • cpe:2.3:a:electronjs:electron:42.0.0:alpha6:*:*:*:node.js:*:*
    • cpe:2.3:a:electronjs:electron:42.0.0:beta1:*:*:*:node.js:*:*
    • cpe:2.3:a:electronjs:electron:42.0.0:beta2:*:*:*:node.js:*:*
    • cpe:2.3:a:electronjs:electron:42.0.0:beta3:*:*:*:node.js:*:*
    • cpe:2.3:a:electronjs:electron:42.0.0:beta4:*:*:*:node.js:*:*
    • cpe:2.3:a:electronjs:electron:42.0.0:beta5:*:*:*:node.js:*:*
    • cpe:2.3:a:electronjs:electron:42.0.0:beta6:*:*:*:node.js:*:*
    • cpe:2.3:a:electronjs:electron:42.0.0:beta7:*:*:*:node.js:*:*
    • cpe:2.3:a:electronjs:electron:42.0.0:beta8:*:*:*:node.js:*:*
  • Electron PDF/Electron PDFllm-fuzzy
    Range: <39.8.10, <40.9.3, <41.4.0, <42.0.0

Patches

Vulnerability mechanics

References

2

News mentions

1