Electron: openExternal permission requests can be attributed to the wrong origin

中 5.4CVE-2026-114121 · GHSA-997q-gvvc-jwmx · 21/10/2026 公開 · 28/10/2026 更新

要点

CVE-2026-114121 は electron に影響する深刻度「中」 (CVSS 5.4) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.22%（全脆弱性の 12.4% より高い）。
対処：43.7.0, 44.3.0, 45.0.0-alpha.5, 42.11.3 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
electron npm	`≥ 43.0.0-alpha.1, < 43.7.0≥ 44.0.0-alpha.1, < 44.3.0≥ 45.0.0-alpha.1, < 45.0.0-alpha.5< 42.11.3`	`43.7.044.3.045.0.0-alpha.542.11.3`

概要

Impact

Requests 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.

Apps 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.

Workarounds

Deny the openExternal permission for untrusted content, or deny the windows it opens with setWindowOpenHandler.

Fixed Versions

45.0.0-alpha.5
44.3.0
43.7.0
42.11.3

For more information

If you have any questions or comments about this advisory, email us at [email protected]

NVD の説明

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 42.11.3, 43.7.0, 44.3.0, and 45.0.0-alpha.5, requests to open external protocol URLs could be attributed to a document other than the one that initiated them, causing the requestingUrl passed to session.setPermissionRequestHandler to identify trusted content for a launch requested by untrusted content. An application that grants openExternal based on the requesting origin and allows untrusted content to open or navigate windows could therefore allow that content to launch an OS-registered external application. This issue is fixed in versions 42.11.3, 43.7.0, 44.3.0, and 45.0.0-alpha.5.