{"id":"CVE-2026-102673","aliases":["GHSA-hq2x-r82h-9wj4"],"url":"https://o3.security/vulnerability/CVE-2026-102673","summary":"Electron drops inherited HTML sandbox restrictions for popups opened through OpenURLFromTab","details":"### Impact\n\nPopups opened from a sandboxed iframe through a link (for example `target=\"_blank\"` or a middle-click) did not inherit the iframe's HTML `sandbox` restrictions. Content that was meant to run sandboxed could open a popup with the embedding app's full origin, gaining access to that origin's cookies, storage, and same-origin scripting.\n\nApps are only affected if they embed untrusted content in iframes sandboxed with `allow-scripts allow-popups`. Apps that do not embed untrusted content in sandboxed iframes are not affected.\n\n### Workarounds\n\nUse `setWindowOpenHandler` on the parent `WebContents` to deny or constrain popups opened from sandboxed frames, or do not apply `allow-popups` to sandboxed iframes that render untrusted content.\n\n### Fixed Versions\n\n* `43.0.0`\n* `42.5.2`\n* `41.10.4`\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":"2026-09-29T16:38:41.946Z","modified":"2026-10-21T09:31:57.668133125Z","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":"41.10.4"},{"ecosystem":"npm","name":"electron","fixedVersion":"42.5.2"},{"ecosystem":"npm","name":"electron","fixedVersion":"43.0.0"}],"fix":{"url":"https://github.com/electron/electron/commit/7ea14d5f55ecb11a30447701ddca16b3feee0bba","label":"electron/electron@7ea14d5"},"references":[{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v41.10.4"},{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v42.5.2"},{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v43.0.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102673.json"},{"type":"ADVISORY","url":"https://github.com/electron/electron/security/advisories/GHSA-hq2x-r82h-9wj4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102673"},{"type":"FIX","url":"https://github.com/electron/electron/commit/7ea14d5f55ecb11a30447701ddca16b3feee0bba"},{"type":"FIX","url":"https://github.com/electron/electron/commit/e26b2640e7795c42bfb111b76009cbb4327c9a69"},{"type":"FIX","url":"https://github.com/electron/electron/commit/ebe1165ee2b05c203c26dd2244ef1c5b9b1c04da"},{"type":"FIX","url":"https://github.com/electron/electron/pull/52133"},{"type":"PACKAGE","url":"https://github.com/electron/electron"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T09:31:57.668133125Z"}}