Electron: Local race condition in Squirrel.Mac update installation on macOS

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-102672
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-13 16:17:09 UTC
Updated2026-10-13 21:17:20 UTC
DescriptionElectron 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.

Risk And Classification

Primary CVSS: v3.1 6.7 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

Problem Types: CWE-367 | CWE-367 CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
3.1CNADECLARED6.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Electron Electron affected < 39.8.10 Not specified
CNA Electron Electron affected >= 40.0.0-alpha.1, < 41.10.5 Not specified
CNA Electron Electron affected >= 42.0.0-alpha.1, < 42.0.0-beta.2 Not specified

References

ReferenceSourceLinkTags
github.com/electron/electron/commit/a0f9ff4cc0340545008424232d49caadd9c0... [email protected] github.com
github.com/electron/electron/commit/b8f25c4cedb2e0f5f475912b709aba19c57c... [email protected] github.com
github.com/electron/electron/pull/50745 [email protected] github.com
github.com/electron/electron/releases/tag/v41.10.5 [email protected] github.com
github.com/electron/electron/commit/15e2928a5c5f01759107b414010e220d90d5... [email protected] github.com
github.com/electron/electron/security/advisories/GHSA-vv43-5jgx-7qv8 [email protected] github.com
github.com/electron/electron/commit/01faabfc250801a980fc94d64608046c67fc... [email protected] github.com
github.com/electron/electron/releases/tag/v42.0.0-beta.2 [email protected] github.com
github.com/electron/electron/releases/tag/v39.8.10 [email protected] github.com
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