In Firefox before 68.0, 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.
In Firefox before 68.0, 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.
https://www.mozilla.org/en-US/security/advisories/mfsa2019-21/#CVE-2019-11716 https://bugzilla.mozilla.org/show_bug.cgi?id=1552632
Vulmon