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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-942"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70604.json"
}{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "39.8.10"
},
{
"introduced": "40.0.0-alpha.1"
},
{
"fixed": "40.9.3"
},
{
"introduced": "41.0.0-alpha.1"
},
{
"fixed": "41.4.0"
},
{
"introduced": "42.0.0-alpha.1"
},
{
"fixed": "42.0.0"
}
]
}"2026-08-07T22:16:27Z"
[
{
"target": {
"file": "shell/browser/native_window_views.cc"
},
"digest": {
"line_hashes": [
"152457830963758986642136289935309603076",
"140384925509297560568636728427147432512",
"151624630247024988073012984528740724048",
"82366127799559731523332335390630051229",
"157780016635945710127766213444477016595",
"180459056581467853149894843423461140899",
"235792204129061948580546162960110639927",
"5257894445260545943559425349834798288"
],
"threshold": 0.9
},
"signature_version": "v1",
"signature_type": "Line",
"deprecated": false,
"id": "CVE-2026-70604-a0dbed46",
"source": "https://github.com/electron/electron/commit/51db52e1b56e0739944dfbc679a86f2c69a26e5f"
}
]
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-70604.json"