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CVE-2026-34767— Electron: HTTP Response Header Injection in custom protocol handlers and webRequest

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、39.8.3之前版本、40.8.3之前版本和41.0.3之前版本存在注入漏洞，该漏洞源于通过protocol.handle或protocol.registerSchemesAsPrivileged注册自定义协议处理程序或通过webRequest.onHeadersRece

CVSS 5.9 · Medium EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-34767

Vulnerability Information
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Vulnerability Title
Electron: HTTP Response Header Injection in custom protocol handlers and webRequest
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, 39.8.3, 40.8.3, and 41.0.3, apps that register custom protocol handlers via protocol.handle() / protocol.registerSchemesAsPrivileged() or modify response headers via webRequest.onHeadersReceived may be vulnerable to HTTP response header injection if attacker-controlled input is reflected into a response header name or value. An attacker who can influence a header value may be able to inject additional response headers, affecting cookies, content security policy, or cross-origin access controls. Apps that do not reflect external input into response headers are not affected. This issue has been patched in versions 38.8.6, 39.8.3, 40.8.3, and 41.0.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Electron 注入漏洞
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、39.8.3之前版本、40.8.3之前版本和41.0.3之前版本存在注入漏洞，该漏洞源于通过protocol.handle或protocol.registerSchemesAsPrivileged注册自定义协议处理程序或通过webRequest.onHeadersRece
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-2026-34767

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III. Intelligence Information for CVE-2026-34767

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Vendor Advisories for CVE-2026-34767 (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-2026-34778 5.9 MEDIUM Electron: Service worker can spoof executeJavaScript IPC replies
CVE-2026-34772 5.8 MEDIUM Electron: Use-after-free in download save dialog callback
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-74

V. Comments for CVE-2026-34767

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