{"id":"CVE-2026-114121","aliases":["GHSA-997q-gvvc-jwmx"],"url":"https://o3.security/vulnerability/CVE-2026-114121","summary":"Electron: openExternal permission requests can be attributed to the wrong origin","details":"### Impact\nRequests to open external protocol URLs could be attributed to a document other than the one that asked for them, so the `requestingUrl` passed to `session.setPermissionRequestHandler` was a trusted origin for a launch untrusted content had requested. An origin-based handler could therefore let untrusted content launch an OS-registered external application.\n\nApps are only affected if they grant `openExternal` based on the requesting origin and let untrusted content open or navigate windows. Apps whose permission handler denies `openExternal` for untrusted content are not affected.\n\n### Workarounds\nDeny the `openExternal` permission for untrusted content, or deny the windows it opens with `setWindowOpenHandler`.\n\n### Fixed Versions\n* `45.0.0-alpha.5`\n* `44.3.0`\n* `43.7.0`\n* `42.11.3`\n\n### For more information\nIf you have any questions or comments about this advisory, email us at [security@electronjs.org](mailto:security@electronjs.org)","published":"2026-10-21T16:20:07.261Z","modified":"2026-10-24T02:48:53.346160175Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"electron","fixedVersion":"42.11.3"},{"ecosystem":"npm","name":"electron","fixedVersion":"43.7.0"},{"ecosystem":"npm","name":"electron","fixedVersion":"44.3.0"},{"ecosystem":"npm","name":"electron","fixedVersion":"45.0.0-alpha.5"}],"fix":{"url":"https://github.com/electron/electron/commit/25057643bf6d9a20bad69e45707551ccf546f5ce","label":"electron/electron@2505764"},"references":[{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v42.11.3"},{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v43.7.0"},{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v44.3.0"},{"type":"WEB","url":"https://github.com/electron/electron/releases/tag/v45.0.0-alpha.5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114121.json"},{"type":"ADVISORY","url":"https://github.com/electron/electron/security/advisories/GHSA-997q-gvvc-jwmx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114121"},{"type":"FIX","url":"https://github.com/electron/electron/commit/25057643bf6d9a20bad69e45707551ccf546f5ce"},{"type":"FIX","url":"https://github.com/electron/electron/commit/8aa5414f73792ed3b2e3f9ab6391b1832e6dc2c3"},{"type":"FIX","url":"https://github.com/electron/electron/commit/92a783952891805f2f82f344c40a6917b98a7d98"},{"type":"FIX","url":"https://github.com/electron/electron/commit/e0a20d5277b567aea8603f8e9852a4341407a586"},{"type":"FIX","url":"https://github.com/electron/electron/commit/e3a400911084537bce7380ffea8af939572ce8dd"},{"type":"FIX","url":"https://github.com/electron/electron/pull/53682"},{"type":"FIX","url":"https://github.com/electron/electron/pull/53696"},{"type":"FIX","url":"https://github.com/electron/electron/pull/53697"},{"type":"FIX","url":"https://github.com/electron/electron/pull/53698"},{"type":"FIX","url":"https://github.com/electron/electron/pull/53699"},{"type":"PACKAGE","url":"https://github.com/electron/electron"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T02:48:53.346160175Z"}}