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A GitHub-reviewed security advisory, not necessarily under active exploitation the way our CISA KEV advisories are, but a real, disclosed vulnerability in an open-source dependency.
Affected packages
Vulnerable: < 39.8.10
Patched in 39.8.10
Vulnerable: >= 40.0.0-alpha.1, < 41.10.5
Patched in 41.10.5
Vulnerable: >= 42.0.0-alpha.1, < 42.0.0-beta.2
Patched in 42.0.0-beta.2
Details
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.
There are no app side workarounds, you must update to a patched version of Electron.
42.0.0-beta.241.10.539.8.10If you have any questions or comments about this advisory, email us at [email protected]
EPSS, exploit probability
Low0.09%
estimated chance of real-world exploitation in the next 30 days, higher than 0.5% of every CVE FIRST.org scores
Refreshed 11/14/2026, via FIRST.org's EPSS model, not CVSS, this measures likelihood of exploitation, not how severe it would be.
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