CVE-2026-34765 | Electron up to 39.8.4/40.8.4/41.0.x window.open exposure of resource

VDB-355956 · CVE-2026-34765 · GCVE-0-2026-34765 ELECTRON UP TO 39.8.4/40.8.4/41.0.X WINDOW.OPEN EXPOSURE OF RESOURCE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.4 $0-$5k 2.65 Summaryinfo A vulnerability was found in Electron up to 39.8.4/40.8.4/41.0.x. It has been declared as problematic. The impacted element is the function window.open. The manipulation results in exposure of resource. This vulnerability is identified as CVE-2026-34765. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component. Detailsinfo A vulnerability was found in Electron up to 39.8.4/40.8.4/41.0.x. It has been classified as problematic. Affected is the function window.open. The manipulation with an unknown input leads to a exposure of resource vulnerability. CWE is classifying the issue as CWE-668. The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes: Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.5, 40.8.5, 41.1.0, and 42.0.0-alpha.5, when a renderer calls window.open() with a target name, Electron did not correctly scope the named-window lookup to the opener's browsing context group. A renderer could navigate an existing child window that was opened by a different, unrelated renderer if both used the same target name. If that existing child was created with more permissive webPreferences (via setWindowOpenHandler's overrideBrowserWindowOptions), content loaded by the second renderer inherits those permissions. Apps are only affected if they open multiple top-level windows with differing trust levels and use setWindowOpenHandler to grant child windows elevated webPreferences such as a privileged preload script. Apps that do not elevate child window privileges, or that use a single top-level window, are not affected. Apps that additionally grant nodeIntegration: true or sandbox: false to child windows (contrary to the security recommendations) may be exposed to arbitrary code execution. This vulnerability is fixed in 39.8.5, 40.8.5, 41.1.0, and 42.0.0-alpha.5. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-34765 since 03/30/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. Upgrading to version 39.8.5, 40.8.5, 41.1.0 or 42.0.0-alpha.5 eliminates this vulnerability. Productinfo Name Electron Version 39.8.0 39.8.1 39.8.2 39.8.3 39.8.4 40.8.0 40.8.1 40.8.2 40.8.3 40.8.4 41.0 Website Product: https://github.com/electron/electron/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.5 VulDB Meta Temp Score: 5.4 VulDB Base Score: 5.0 VulDB Temp Score: 4.8 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 6.0 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Exposure of resource CWE: CWE-668 / CWE-200 / CWE-284 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Electron 39.8.5/40.8.5/41.1.0/42.0.0-alpha.5 Timelineinfo 03/30/2026 CVE reserved 04/07/2026 +8 days Advisory disclosed 04/07/2026 +0 days VulDB entry created 04/07/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-34765 (🔒) GCVE (CVE): GCVE-0-2026-34765 GCVE (VulDB): GCVE-100-355956 Entryinfo Created: 04/07/2026 23:34 Changes: 04/07/2026 23:34 (62) Complete: 🔍 Cache ID: 99:69D:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸