CVE-2026-70604 (GCVE-0-2026-70604)

Vulnerability from cvelistv5 – Published: 2026-08-05 15:59 – Updated: 2026-08-05 18:41
VLAI
Title
Electron: Custom protocol with supportFetchAPI but not corsEnabled allows cross-origin reads
Summary
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.
Severity
7.4 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 18:13 UTC
CWE
  • CWE-942 - Permissive Cross-domain Policy with Untrusted Domains
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 8035 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
electron electron Affected: < 39.8.10
Affected: >= 40.0.0-alpha.1, < 40.9.3
Affected: >= 41.0.0-alpha.1, < 41.4.0
Affected: >= 42.0.0-alpha.1, < 42.0.0
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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