MediumGHSA-vv43-5jgx-7qv8CVE-2026-102672

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

Published 29 Sept 2026 · Updated 29 Sept 2026

Affected packages

electronnpm

Affected: <39.8.10
Fixed in: 39.8.10

Update to the fixed version for your release line, for example:npm install electron@39.8.10

electronnpm

Affected: >=40.0.0-alpha.1 <41.10.5
Fixed in: 41.10.5

Update to the fixed version for your release line, for example:npm install electron@41.10.5

electronnpm

Affected: >=42.0.0-alpha.1 <42.0.0-beta.2
Fixed in: 42.0.0-beta.2

Update to the fixed version for your release line, for example:npm install electron@42.0.0-beta.2

Details

Impact

On macOS, Electron bundles the Squirrel.Mac auto-update framework, whose privileged ShipIt helper performs the final step of an update as root. A local attacker could cause that helper to overwrite a different application's files, as root, instead of the app that started the update. Exploitation requires local access to the machine.

Apps are only affected on macOS if they ship Squirrel.Mac-based auto-updates. Apps on other platforms, or that do not use Squirrel.Mac auto-updates, are not affected.

Workarounds

There are no app side workarounds, you must update to a patched version of Electron.

Fixed Versions

42.0.0-beta.2
41.10.5
39.8.10

For more information

If you have any questions or comments about this advisory, email us at [security@electronjs.org](mailto:security@electronjs.org)

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.