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CVE-2026-34772— Electron: Use-after-free in download save dialog callback

Quick assessment

Affected
electron electron
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Electron是Electron开源的一个用户编写跨平台桌面应用的 JavaScript 框架。该框架基于 nodejs 和 Chromium 可以使用HTML，CSS实现跨平台桌面应用的编写。 Electron 38.8.6之前版本、39.8.0之前版本、40.7.0之前版本和41.0.0-beta.8之前版本存在资源管理错误漏洞，该漏洞源于允许下载并以编程方式销毁会话时存在释放后重用问题，可能导致崩溃或内存损坏。

CVSS 5.8 · Medium EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2026-34772

Vulnerability Information
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Vulnerability Title
Electron: Use-after-free in download save dialog callback
Source: CVE Program / CVE List V5
Vulnerability Description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, apps that allow downloads and programmatically destroy sessions may be vulnerable to a use-after-free. If a session is torn down while a native save-file dialog is open for a download, dismissing the dialog dereferences freed memory, which may lead to a crash or memory corruption. Apps that do not destroy sessions at runtime, or that do not permit downloads, are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Electron 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Electron是Electron开源的一个用户编写跨平台桌面应用的 JavaScript 框架。该框架基于 nodejs 和 Chromium 可以使用HTML，CSS实现跨平台桌面应用的编写。 Electron 38.8.6之前版本、39.8.0之前版本、40.7.0之前版本和41.0.0-beta.8之前版本存在资源管理错误漏洞，该漏洞源于允许下载并以编程方式销毁会话时存在释放后重用问题，可能导致崩溃或内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
electron electron < 38.8.6 -

II. Public POCs for CVE-2026-34772

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III. Intelligence Information for CVE-2026-34772

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Vendor Advisories for CVE-2026-34772 (1)

Same Patch Batch · electron · 2026-04-03 · 13 CVEs total

CVE-2026-34774 8.1 HIGH Electron: Use-after-free in offscreen child window paint callback
CVE-2026-34769 7.8 HIGH Electron: Renderer command-line switch injection via undocumented commandLineSwitches webP
CVE-2026-34771 7.5 HIGH Electron: Use-after-free in WebContents fullscreen, pointer-lock, and keyboard-lock permis
CVE-2026-34770 7.0 HIGH Electron: Use-after-free in PowerMonitor on Windows and macOS
CVE-2026-34775 6.8 MEDIUM Electron: nodeIntegrationInWorker not correctly scoped in shared renderer processes
CVE-2026-34767 5.9 MEDIUM Electron: HTTP Response Header Injection in custom protocol handlers and webRequest
CVE-2026-34778 5.9 MEDIUM Electron: Service worker can spoof executeJavaScript IPC replies
CVE-2026-34777 5.4 MEDIUM Electron: Incorrect origin passed to permission request handler for iframe requests
CVE-2026-34776 5.3 MEDIUM Electron: Out-of-bounds read in second-instance IPC on macOS and Linux
CVE-2026-34773 4.7 MEDIUM Electron: Registry key path injection in app.setAsDefaultProtocolClient on Windows
CVE-2026-34768 3.9 LOW Electron: Unquoted executable path in app.setLoginItemSettings on Windows
CVE-2026-34766 3.3 LOW Electron: USB device selection not validated against filtered device list

IV. Related Vulnerabilities

Same product: electron
Same vendor: electron
Same weakness: CWE-416

V. Comments for CVE-2026-34772

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