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CVE-2026-102672— Electron: Local race condition in Squirrel.Mac update installation on macOS

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 是一个用于使用 JavaScript、HTML 和 CSS 编写跨平台桌面应用程序的框架。在版本 39.8.10、41.10.5 和 42.0.0-beta.2 之前，macOS 平台上使用基于 Squirrel.Mac 的自动更新功能的 Electron 应用程序存在漏洞，该漏洞源于特权辅助程序 ShipIt 中存在本地竞争条件（local race）。该辅助程序在完整安装过程中未将经过验证的更新目标绑定到某个规范化的应用程序包路径，导致本地攻击者可以重定向根级别的写入操作，使其覆盖其他应用程序

CVSS 6.7 · Medium

Affected Version Matrix 3

VendorProduct Version RangeStatus
electron electron < 39.8.10 affected
>= 40.0.0-alpha.1, < 41.10.5 affected
>= 42.0.0-alpha.1, < 42.0.0-beta.2 affected
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I. Basic Information for CVE-2026-102672

Vulnerability Information
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Vulnerability Title
Electron: Local race condition in Squirrel.Mac update installation on macOS
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 39.8.10, 41.10.5, and 42.0.0-beta.2, Electron applications on macOS that use Squirrel.Mac-based automatic updates are vulnerable to a local race in the privileged ShipIt helper. The helper did not bind the validated update target to one canonical application-bundle path for the full installation, allowing a local attacker to redirect the root-level write so that it overwrites another application's files instead of the application that initiated the update. Applications on other platforms and macOS applications that do not use Squirrel.Mac-based automatic updates are not affected. This issue is fixed in versions 39.8.10, 41.10.5, and 42.0.0-beta.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
electron electron < 39.8.10 -

II. Public POCs for CVE-2026-102672

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III. Intelligence Information for CVE-2026-102672

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Patches & Fixes for CVE-2026-102672 (5)

Vendor Advisories for CVE-2026-102672 (1)

Vendor Pages for CVE-2026-102672 (3)

IV. Related Vulnerabilities

Same product: electron
Same vendor: electron
Same weakness: CWE-367

V. Comments for CVE-2026-102672

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