{"id":"CVE-2026-102674","aliases":["GHSA-gr2m-v5gq-v685"],"url":"https://o3.security/vulnerability/CVE-2026-102674","summary":"Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions","details":"### 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)","published":"2026-09-29T16:51:26.963Z","modified":"2026-10-21T09:31:58.037713484Z","cvss":{"score":8.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"electron","fixedVersion":"41.10.6"},{"ecosystem":"npm","name":"electron","fixedVersion":"42.9.2"},{"ecosystem":"npm","name":"electron","fixedVersion":"43.4.1"},{"ecosystem":"npm","name":"electron","fixedVersion":"44.0.0-beta.5"}],"fix":{"url":"https://github.com/electron/electron/commit/29fc130569f970e91e355383821a4af0f25724a2","label":"electron/electron@29fc130"},"references":[{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v41.10.6"},{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v42.9.2"},{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v43.4.1"},{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v44.0.0-beta.5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102674.json"},{"type":"ADVISORY","url":"https://github.com/electron/electron/security/advisories/GHSA-gr2m-v5gq-v685"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102674"},{"type":"FIX","url":"https://github.com/electron/electron/commit/29fc130569f970e91e355383821a4af0f25724a2"},{"type":"FIX","url":"https://github.com/electron/electron/commit/3ecf3e74f4be6e2360644679b0b4698742be0e1d"},{"type":"FIX","url":"https://github.com/electron/electron/commit/6594d5a5b074cf501da084dc7908d3df0d68a886"},{"type":"FIX","url":"https://github.com/electron/electron/commit/e9c4d3cbe912e18d7c63af78e63e98ae7a48cd3a"},{"type":"PACKAGE","url":"https://github.com/electron/electron"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T09:31:58.037713484Z"}}