{"cve":"CVE-2026-70604","nvd":{"published":"2026-08-05T16:17:04.617","modified":"2026-10-08T13:53:51.593","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N","score":7.4},"cwes":["CWE-942"],"references":["https://github.com/electron/electron/security/advisories/GHSA-v3j7-r9gq-3gjw"],"products":["electronjs:electron"],"source":"nvd","synced_at":"2026-10-19T22:47:10.050265369+00:00"},"epss":{"cve":"CVE-2026-70604","score":0.00354,"percentile":0.28875,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-v3j7-r9gq-3gjw","url":"https://osv.dev/vulnerability/GHSA-v3j7-r9gq-3gjw","summary":"Electron: Custom protocol with supportFetchAPI but not corsEnabled allows cross-origin reads","modified":"2026-08-05T16:26:04.421893Z","packages":[{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":[">=42.0.0-alpha.1 <42.0.0"],"fixed":["42.0.0"]},{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":[">=41.0.0-alpha.1 <41.4.0"],"fixed":["41.4.0"]},{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":[">=40.0.0-alpha.1 <40.9.3"],"fixed":["40.9.3"]},{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":["<39.8.10"],"fixed":["39.8.10"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}