CVE-2026-102672
Electron: Local race condition in Squirrel.Mac update installation on macOS
- State
- Published
- Severity
- 6.7 Medium
- Published
- Oct 13, 2026
- Updated
- Oct 13, 2026
- Reserved
- Sep 29, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.7 Medium | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H | GitHub_M |
Weaknesses
- CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
Affected Products
| Product | Versions |
|---|---|
electronelectron |
|
References
- https://github.com/electron/electron/security/advisories/GHSA-vv43-5jgx-7qv8
- https://github.com/electron/electron/pull/50745
- https://github.com/electron/electron/commit/01faabfc250801a980fc94d64608046c67fc1cd9
- https://github.com/electron/electron/commit/15e2928a5c5f01759107b414010e220d90d59cef
- https://github.com/electron/electron/commit/a0f9ff4cc0340545008424232d49caadd9c0c767
- https://github.com/electron/electron/commit/b8f25c4cedb2e0f5f475912b709aba19c57c26be
- https://github.com/electron/electron/releases/tag/v39.8.10
- https://github.com/electron/electron/releases/tag/v41.10.5
- https://github.com/electron/electron/releases/tag/v42.0.0-beta.2
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