{"id":"CVE-2026-102674","aliases":["EUVD-2026-89091","GHSA-gr2m-v5gq-v685"],"status":"published","title":"Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions","description":"Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5, windows opened from a sandboxed top-level document did not inherit that document's active HTML sandbox restrictions. Untrusted content in a sandboxed top-level document that was permitted to open popups could therefore create a window with the Electron application's full origin instead of the restricted origin intended by the sandbox. Applications that deny such popups with setWindowOpenHandler are not affected. This issue is fixed in versions 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5.","severity":{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00236,"percentile":0.14672,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-266","CWE-693"],"published":"2026-09-29T16:51:26Z","modified":"2026-11-11T02:48:40Z","fixes":[{"ecosystem":"npm","package":"electron","fixed_in":["41.10.6","42.9.2","43.4.1","44.0.0-beta.5"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"electron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"41.10.6"}]}]},{"source":"ghsa","ecosystem":"npm","package":"electron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"42.0.0-alpha.1"},{"fixed":"42.9.2"}]}]},{"source":"ghsa","ecosystem":"npm","package":"electron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"43.0.0-alpha.1"},{"fixed":"43.4.1"}]}]},{"source":"ghsa","ecosystem":"npm","package":"electron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"44.0.0-alpha.1"},{"fixed":"44.0.0-beta.5"}]}]},{"source":"osv","ecosystem":"npm","package":"electron","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"41.10.6"}]}]},{"source":"osv","ecosystem":"npm","package":"electron","ranges":[{"type":"SEMVER","events":[{"introduced":"42.0.0-alpha.1"},{"fixed":"42.9.2"}]}]},{"source":"osv","ecosystem":"npm","package":"electron","ranges":[{"type":"SEMVER","events":[{"introduced":"43.0.0-alpha.1"},{"fixed":"43.4.1"}]}]},{"source":"osv","ecosystem":"npm","package":"electron","ranges":[{"type":"SEMVER","events":[{"introduced":"44.0.0-alpha.1"},{"fixed":"44.0.0-beta.5"}]}]}],"products":[{"vendor":"electron","product":"electron"},{"vendor":"electronjs","product":"electron"}],"references":[{"url":"https://github.com/electron/electron/security/advisories/GHSA-gr2m-v5gq-v685","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory","web"]},{"url":"https://github.com/electron/electron/commit/29fc130569f970e91e355383821a4af0f25724a2","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/electron/electron/commit/3ecf3e74f4be6e2360644679b0b4698742be0e1d","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/electron/electron/commit/6594d5a5b074cf501da084dc7908d3df0d68a886","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/electron/electron/commit/e9c4d3cbe912e18d7c63af78e63e98ae7a48cd3a","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/electron/electron/releases/tag/v41.10.6","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://github.com/electron/electron/releases/tag/v42.9.2","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://github.com/electron/electron/releases/tag/v43.4.1","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://github.com/electron/electron/releases/tag/v44.0.0-beta.5","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://github.com/advisories/GHSA-gr2m-v5gq-v685"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102674.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102674","tags":["advisory"]},{"url":"https://github.com/electron/electron","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-102674","title":"Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions","description":"Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5, windows opened from a sandboxed top-level document did not inherit that document's active HTML sandbox restrictions. Untrusted content in a sandboxed top-level document that was permitted to open popups could therefore create a window with the Electron application's full origin instead of the restricted origin intended by the sandbox. Applications that deny such popups with setWindowOpenHandler are not affected. This issue is fixed in versions 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5.","status":"published","published":"2026-09-29T16:51:26.963Z","modified":"2026-09-29T17:20:35.969Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-266","CWE-693"],"updated_at":"2026-11-02T13:38:54.394896Z"}],"euvd":[{"id":"EUVD-2026-89091","description":"Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5, windows opened from a sandboxed top-level document did not inherit that document's active HTML sandbox restrictions. Untrusted content in a sandboxed top-level document that was permitted to open popups could therefore create a window with the Electron application's full origin instead of the restricted origin intended by the sandbox. Applications that deny such popups with setWindowOpenHandler are not affected. This issue is fixed in versions 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5.","status":"published","published":"2026-09-29T16:51:26Z","modified":"2026-09-29T17:20:35Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N","level":"high"}],"updated_at":"2026-11-02T17:27:51.524944Z"}],"ghsa":[{"id":"GHSA-gr2m-v5gq-v685","title":"Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions","description":"### Impact\n\nWindows opened from a sandboxed top-level document did not inherit that document's HTML `sandbox` restrictions, so content that was meant to run sandboxed could open a window with the app's full origin. GHSA-hq2x-r82h-9wj4 covers the same issue for sandboxed iframes.\n\nApps are only affected if they render untrusted content in a sandboxed top-level document that allows popups. Apps that deny popups from untrusted content with `setWindowOpenHandler` are not affected.\n\n### Workarounds\n\nReturn `{ action: 'deny' }` from `setWindowOpenHandler` for windows opened by untrusted content.\n\n### Fixed Versions\n\n* `44.0.0-beta.5`\n* `43.4.1`\n* `42.9.2`\n* `41.10.6`\n\n### For more information\n\nIf you have any questions or comments about this advisory, email us at [security@electronjs.org](mailto:security@electronjs.org)","status":"published","published":"2026-09-29T18:05:11Z","modified":"2026-09-29T18:05:12Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N","level":"high"}],"cwes":["CWE-266","CWE-693"],"updated_at":"2026-11-02T14:41:22.654187Z"}],"nvd":[{"id":"CVE-2026-102674","description":"Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5, windows opened from a sandboxed top-level document did not inherit that document's active HTML sandbox restrictions. Untrusted content in a sandboxed top-level document that was permitted to open popups could therefore create a window with the Electron application's full origin instead of the restricted origin intended by the sandbox. Applications that deny such popups with setWindowOpenHandler are not affected. This issue is fixed in versions 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5.","status":"published","published":"2026-09-29T17:17:07.653Z","modified":"2026-10-15T13:58:37.623Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-266","CWE-693"],"updated_at":"2026-11-02T14:12:52.413234Z"}],"osv":[{"id":"CVE-2026-102674","title":"Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions","description":"Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5, windows opened from a sandboxed top-level document did not inherit that document's active HTML sandbox restrictions. Untrusted content in a sandboxed top-level document that was permitted to open popups could therefore create a window with the Electron application's full origin instead of the restricted origin intended by the sandbox. Applications that deny such popups with setWindowOpenHandler are not affected. This issue is fixed in versions 41.10.6, 42.9.2, 43.4.1, and 44.0.0-beta.5.","status":"published","published":"2026-09-29T16:51:26.963Z","modified":"2026-11-11T07:18:18.72654859Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N","level":"high"}],"cwes":["CWE-266","CWE-693"],"updated_at":"2026-11-11T03:22:05.70559Z"},{"id":"GHSA-gr2m-v5gq-v685","title":"Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions","description":"### Impact\n\nWindows opened from a sandboxed top-level document did not inherit that document's HTML `sandbox` restrictions, so content that was meant to run sandboxed could open a window with the app's full origin. GHSA-hq2x-r82h-9wj4 covers the same issue for sandboxed iframes.\n\nApps are only affected if they render untrusted content in a sandboxed top-level document that allows popups. Apps that deny popups from untrusted content with `setWindowOpenHandler` are not affected.\n\n### Workarounds\n\nReturn `{ action: 'deny' }` from `setWindowOpenHandler` for windows opened by untrusted content.\n\n### Fixed Versions\n\n* `44.0.0-beta.5`\n* `43.4.1`\n* `42.9.2`\n* `41.10.6`\n\n### For more information\n\nIf you have any questions or comments about this advisory, email us at [security@electronjs.org](mailto:security@electronjs.org)","status":"published","published":"2026-09-29T18:05:11Z","modified":"2026-09-29T18:15:04.698174561Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N","level":"high"}],"cwes":["CWE-266","CWE-693"],"updated_at":"2026-11-02T15:46:48.191583Z"}]}}