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Publish Advisories
GHSA-3c8v-cfp5-9885 GHSA-r5p7-gp4j-qhrx GHSA-xj5x-m3f3-5x3h
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‎advisories/github-reviewed/2026/04/GHSA-3c8v-cfp5-9885/GHSA-3c8v-cfp5-9885.json‎

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{
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"schema_version": "1.4.0",
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"id": "GHSA-3c8v-cfp5-9885",
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"modified": "2026-04-03T02:43:59Z",
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"published": "2026-04-03T02:43:59Z",
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"aliases": [
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"CVE-2026-34776"
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],
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"summary": "Electron: Out-of-bounds read in second-instance IPC on macOS and Linux",
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"details": "### Impact\nOn macOS and Linux, apps that call `app.requestSingleInstanceLock()` were vulnerable to an out-of-bounds heap read when parsing a crafted second-instance message. Leaked memory could be delivered to the app's `second-instance` event handler.\n\nThis issue is limited to processes running as the same user as the Electron app.\n\nApps that do not call `app.requestSingleInstanceLock()` are not affected. Windows is not affected by this issue.\n\n### Workarounds\nThere are no app side workarounds, developers must update to a patched version of Electron.\n\n### Fixed Versions\n* `41.0.0`\n* `40.8.1`\n* `39.8.1`\n* `38.8.6`\n\n### For more information\nIf there are any questions or comments about this advisory, please email [security@electronjs.org](mailto:security@electronjs.org)",
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"severity": [
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{
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"type": "CVSS_V3",
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"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:L"
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}
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],
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"affected": [
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{
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"package": {
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"ecosystem": "npm",
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"name": "electron"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "0"
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},
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{
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"fixed": "38.8.6"
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}
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]
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}
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]
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},
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{
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"package": {
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"ecosystem": "npm",
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"name": "electron"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "39.0.0-alpha.1"
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},
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{
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"fixed": "39.8.1"
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}
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]
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}
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]
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},
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{
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"package": {
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"ecosystem": "npm",
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"name": "electron"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "40.0.0-alpha.1"
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},
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{
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"fixed": "40.8.1"
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}
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]
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}
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]
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},
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{
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"package": {
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"ecosystem": "npm",
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"name": "electron"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "41.0.0-alpha.1"
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},
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{
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"fixed": "41.0.0"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"type": "WEB",
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"url": "https://github.com/electron/electron/security/advisories/GHSA-3c8v-cfp5-9885"
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},
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{
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"type": "PACKAGE",
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"url": "https://github.com/electron/electron"
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}
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],
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"database_specific": {
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"cwe_ids": [
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"CWE-125"
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],
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"severity": "MODERATE",
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"github_reviewed": true,
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"github_reviewed_at": "2026-04-03T02:43:59Z",
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"nvd_published_at": null
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}
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}

‎advisories/github-reviewed/2026/04/GHSA-r5p7-gp4j-qhrx/GHSA-r5p7-gp4j-qhrx.json‎

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{
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"schema_version": "1.4.0",
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"id": "GHSA-r5p7-gp4j-qhrx",
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"modified": "2026-04-03T02:44:26Z",
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"published": "2026-04-03T02:44:26Z",
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"aliases": [
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"CVE-2026-34777"
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],
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"summary": "Electron: Incorrect origin passed to permission request handler for iframe requests",
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"details": "### Impact\nWhen an iframe requests `fullscreen`, `pointerLock`, `keyboardLock`, `openExternal`, or `media` permissions, the origin passed to `session.setPermissionRequestHandler()` was the top-level page's origin rather than the requesting iframe's origin. Apps that grant permissions based on the origin parameter or `webContents.getURL()` may inadvertently grant permissions to embedded third-party content.\n\nThe correct requesting URL remains available via `details.requestingUrl`. Apps that already check `details.requestingUrl` are not affected.\n\n### Workarounds\nIn your `setPermissionRequestHandler`, inspect `details.requestingUrl` rather than the origin parameter or `webContents.getURL()` when deciding whether to grant `fullscreen`, `pointerLock`, `keyboardLock`, `openExternal`, or `media` permissions.\n\n### Fixed Versions\n* `41.0.0`\n* `40.8.1`\n* `39.8.1`\n* `38.8.6`\n\n### For more information\nIf there are any questions or comments about this advisory, please email [security@electronjs.org](mailto:security@electronjs.org)",
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"severity": [
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{
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"type": "CVSS_V3",
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"
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}
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],
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"affected": [
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{
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"package": {
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"ecosystem": "npm",
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"name": "electron"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "0"
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},
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{
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"fixed": "38.8.6"
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}
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]
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}
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]
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},
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{
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"package": {
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"ecosystem": "npm",
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"name": "electron"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "39.0.0-alpha.1"
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},
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{
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"fixed": "39.8.1"
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}
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]
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}
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]
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},
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{
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"package": {
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"ecosystem": "npm",
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"name": "electron"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "40.0.0-alpha.1"
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},
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{
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"fixed": "40.8.1"
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}
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]
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}
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]
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},
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{
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"package": {
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"ecosystem": "npm",
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"name": "electron"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "41.0.0-alpha.1"
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},
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{
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"fixed": "41.0.0"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"type": "WEB",
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"url": "https://github.com/electron/electron/security/advisories/GHSA-r5p7-gp4j-qhrx"
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},
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{
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"type": "PACKAGE",
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"url": "https://github.com/electron/electron"
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}
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],
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"database_specific": {
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"cwe_ids": [
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"CWE-346"
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],
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"severity": "MODERATE",
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"github_reviewed": true,
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"github_reviewed_at": "2026-04-03T02:44:26Z",
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"nvd_published_at": null
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}
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}

‎advisories/github-reviewed/2026/04/GHSA-xj5x-m3f3-5x3h/GHSA-xj5x-m3f3-5x3h.json‎

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{
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"schema_version": "1.4.0",
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"id": "GHSA-xj5x-m3f3-5x3h",
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"modified": "2026-04-03T02:44:59Z",
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"published": "2026-04-03T02:44:59Z",
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"aliases": [
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"CVE-2026-34778"
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],
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"summary": "Electron: Service worker can spoof executeJavaScript IPC replies",
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"details": "### Impact\nA 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.\n\nApps are only affected if they have service workers registered and use the result of `webContents.executeJavaScript()` (or `webFrameMain.executeJavaScript()`) in security-sensitive decisions.\n\n### Workarounds\nDo not trust the return value of `webContents.executeJavaScript()` for security decisions. Use dedicated, validated IPC channels for security-relevant communication with renderers.\n\n### Fixed Versions\n* `41.0.0`\n* `40.8.1`\n* `39.8.1`\n* `38.8.6`\n\n### For more information\nIf there are any questions or comments about this advisory, please email [security@electronjs.org](mailto:security@electronjs.org)",
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"severity": [
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{
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"type": "CVSS_V3",
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"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N"
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}
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],
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"affected": [
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{
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"package": {
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"ecosystem": "npm",
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"name": "electron"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "0"
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},
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{
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"fixed": "38.8.6"
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}
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]
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}
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]
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},
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{
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"package": {
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"ecosystem": "npm",
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"name": "electron"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "39.0.0-alpha.1"
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},
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{
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"fixed": "39.8.1"
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}
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]
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}
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]
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},
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{
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"package": {
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"ecosystem": "npm",
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"name": "electron"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "40.0.0-alpha.1"
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},
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{
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"fixed": "40.8.1"
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}
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]
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}
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]
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},
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{
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"package": {
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"ecosystem": "npm",
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"name": "electron"
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},
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"ranges": [
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{
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"type": "ECOSYSTEM",
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"events": [
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{
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"introduced": "41.0.0-alpha.1"
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},
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{
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"fixed": "41.0.0"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"type": "WEB",
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"url": "https://github.com/electron/electron/security/advisories/GHSA-xj5x-m3f3-5x3h"
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},
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{
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"type": "PACKAGE",
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"url": "https://github.com/electron/electron"
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}
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],
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"database_specific": {
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"cwe_ids": [
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"CWE-290",
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"CWE-345"
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],
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"severity": "MODERATE",
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"github_reviewed": true,
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"github_reviewed_at": "2026-04-03T02:44:59Z",
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"nvd_published_at": null
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}
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}

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