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CVE-2026-34781— Electron crashes in clipboard.readImage() on malformed clipboard image data

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 39.8.5之前版本、40.8.5之前版本、41.1.0之前版本和42.0.0-alpha.5之前版本存在代码问题漏洞，该漏洞源于剪贴板图像解码失败时未检查空位图，可能导致拒绝服务攻击。

CVSS 2.8 · Low EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood
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I. Basic Information for CVE-2026-34781

Vulnerability Information
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Vulnerability Title
Electron crashes in clipboard.readImage() on malformed clipboard image data
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 39.8.5, 40.8.5, 41.1.0, and 42.0.0-alpha.5, apps that call clipboard.readImage() may be vulnerable to a denial of service. If the system clipboard contains image data that fails to decode, the resulting null bitmap is passed unchecked to image construction, triggering a controlled abort and crashing the process. Apps are only affected if they call clipboard.readImage(). Apps that do not read images from the clipboard are not affected. This issue does not allow memory corruption or code execution. This vulnerability is fixed in 39.8.5, 40.8.5, 41.1.0, and 42.0.0-alpha.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Electron 代码问题漏洞
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 39.8.5之前版本、40.8.5之前版本、41.1.0之前版本和42.0.0-alpha.5之前版本存在代码问题漏洞，该漏洞源于剪贴板图像解码失败时未检查空位图，可能导致拒绝服务攻击。
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 < 39.8.5 -

II. Public POCs for CVE-2026-34781

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III. Intelligence Information for CVE-2026-34781

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Vendor Advisories for CVE-2026-34781 (1)

IV. Related Vulnerabilities

Same product: electron
Same vendor: electron
Same weakness: CWE-476

V. Comments for CVE-2026-34781

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