{"id":"CVE-2026-70607","aliases":["GHSA-v93f-fgjr-hjrj"],"url":"https://o3.security/vulnerability/CVE-2026-70607","summary":"Electron: window.open features string controls some window options considered privileged","details":"### Impact\nSome window options supplied by web content in the `window.open()` features string were applied to the new `BrowserWindow` without an allowlist. Untrusted content could set window options it should not control, including options that cause the main process to access attacker-chosen file or network paths.\n\nApps are only affected if untrusted content can call `window.open()` and the app does not override child window options via `setWindowOpenHandler`. Apps that deny `window.open()` for untrusted content, or set `overrideBrowserWindowOptions` explicitly, are not affected.\n\n### Workarounds\nReturn `{ action: 'deny' }` from `setWindowOpenHandler` for untrusted content, or supply `overrideBrowserWindowOptions` so every window option is set explicitly.\n\n### Fixed Versions\n* `42.0.0-beta.3`\n* `41.2.1`\n* `40.9.0`\n* `39.8.8`\n\n### For more information\nIf you have any questions or comments about this advisory, email Electron at [security@electronjs.org](mailto:security@electronjs.org)","published":"2026-08-05T16:24:11.939Z","modified":"2026-10-28T11:22:39.145604025Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"epss":{"score":0.00335,"percentile":0.26541,"asOf":"2026-08-19"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"electron","fixedVersion":"39.8.8"},{"ecosystem":"npm","name":"electron","fixedVersion":"40.9.0"},{"ecosystem":"npm","name":"electron","fixedVersion":"41.2.1"},{"ecosystem":"npm","name":"electron","fixedVersion":"42.0.0-beta.3"}],"fix":{"url":"https://github.com/electron/electron/commit/30cf3882de75ee651bd4e5f27002f13fd3d3163a","label":"electron/electron@30cf388"},"references":[{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v39.8.8"},{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v40.9.0"},{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v41.2.1"},{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v42.0.0-beta.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70607.json"},{"type":"ADVISORY","url":"https://github.com/electron/electron/security/advisories/GHSA-v93f-fgjr-hjrj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70607"},{"type":"FIX","url":"https://github.com/electron/electron/commit/30cf3882de75ee651bd4e5f27002f13fd3d3163a"},{"type":"FIX","url":"https://github.com/electron/electron/commit/4eff3dc09e4d1e62d649c5ce9902f532bb7469c7"},{"type":"FIX","url":"https://github.com/electron/electron/commit/615d62500fc7732d068274b796c49487e652e90b"},{"type":"FIX","url":"https://github.com/electron/electron/commit/fe2e7d0073949b4593b624b93abf1788f5377e55"},{"type":"FIX","url":"https://github.com/electron/electron/pull/50946"},{"type":"FIX","url":"https://github.com/electron/electron/pull/50947"},{"type":"FIX","url":"https://github.com/electron/electron/pull/50948"},{"type":"FIX","url":"https://github.com/electron/electron/pull/50949"},{"type":"PACKAGE","url":"https://github.com/electron/electron"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T11:22:39.145604025Z"}}