{"id":"GHSA-v93f-fgjr-hjrj","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)","aliases":["CVE-2026-70607"],"modified":"2026-08-05T16:41:11.320277Z","published":"2026-08-05T16:24:17Z","database_specific":{"github_reviewed_at":"2026-08-05T16:24:17Z","nvd_published_at":null,"cwe_ids":["CWE-20"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/electron/electron/security/advisories/GHSA-v93f-fgjr-hjrj"},{"type":"WEB","url":"https://github.com/electron/electron/pull/50946"},{"type":"WEB","url":"https://github.com/electron/electron/pull/50947"},{"type":"WEB","url":"https://github.com/electron/electron/pull/50948"},{"type":"WEB","url":"https://github.com/electron/electron/pull/50949"},{"type":"WEB","url":"https://github.com/electron/electron/commit/30cf3882de75ee651bd4e5f27002f13fd3d3163a"},{"type":"WEB","url":"https://github.com/electron/electron/commit/4eff3dc09e4d1e62d649c5ce9902f532bb7469c7"},{"type":"WEB","url":"https://github.com/electron/electron/commit/615d62500fc7732d068274b796c49487e652e90b"},{"type":"WEB","url":"https://github.com/electron/electron/commit/fe2e7d0073949b4593b624b93abf1788f5377e55"},{"type":"PACKAGE","url":"https://github.com/electron/electron"},{"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"}],"affected":[{"package":{"name":"electron","ecosystem":"npm","purl":"pkg:npm/electron"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"39.8.8"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-v93f-fgjr-hjrj/GHSA-v93f-fgjr-hjrj.json"}},{"package":{"name":"electron","ecosystem":"npm","purl":"pkg:npm/electron"},"ranges":[{"type":"SEMVER","events":[{"introduced":"40.0.0-alpha.1"},{"fixed":"40.9.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-v93f-fgjr-hjrj/GHSA-v93f-fgjr-hjrj.json"}},{"package":{"name":"electron","ecosystem":"npm","purl":"pkg:npm/electron"},"ranges":[{"type":"SEMVER","events":[{"introduced":"41.0.0-alpha.1"},{"fixed":"41.2.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-v93f-fgjr-hjrj/GHSA-v93f-fgjr-hjrj.json"}},{"package":{"name":"electron","ecosystem":"npm","purl":"pkg:npm/electron"},"ranges":[{"type":"SEMVER","events":[{"introduced":"42.0.0-alpha.1"},{"fixed":"42.0.0-beta.3"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-v93f-fgjr-hjrj/GHSA-v93f-fgjr-hjrj.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}