Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0, a service worker running in a session could spoof reply messages on the internal IPC channel used by webContents.executeJavaScript() and related methods, causing the main-process promise to resolve with attacker-controlled data. Apps are only affected if they have service workers registered and use the result of webContents.executeJavaScript() (or webFrameMain.executeJavaScript()) in security-sensitive decisions. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34778.json",
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-290",
"CWE-345"
]
}{
"source": "CPE_RANGE",
"cpe": "cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "38.8.6"
},
{
"introduced": "39.0.0"
},
{
"fixed": "39.8.1"
},
{
"introduced": "40.0.0"
},
{
"fixed": "40.8.1"
}
]
}