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.
References9
- github.com/electron/electron/commit/01faabfc250801a980fc94d6460…
- github.com/electron/electron/commit/15e2928a5c5f01759107b414010…
- github.com/electron/electron/commit/a0f9ff4cc0340545008424232d4…
- github.com/electron/electron/commit/b8f25c4cedb2e0f5f475912b709…
- github.com/electron/electron/pull/50745
- github.com/electron/electron/releases/tag/v39.8.10
- github.com/electron/electron/releases/tag/v41.10.5
- github.com/electron/electron/releases/tag/v42.0.0-beta.2
- github.com/electron/electron/security/advisories/GHSA-vv43-5jgx…
Metrics
- CVSS 3.1
-
6.7
MEDIUM
Score source: CNA
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 1 · as of 11 November 2026
- CWE
- CWE-367
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.