Until explicitly accessed by script, `window.globalThis` is not enumerable and, as a result, is not visible to code such as `Object.getOwnPropertyNames(window)`. Sites that deploy a sandboxing that depends on enumerating and freezing access to the window object may miss this, allowing their sandboxes to be bypassed.
Name: the Mozilla project
Upstream: Chris Hacking
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):