Type Confusion Vulnerability in JavaScript Object Groups

CVE-2019-9816 · MEDIUM Severity

AV:N/AC:M/AU:N/C:N/I:P/A:N

A possible vulnerability exists where type confusion can occur when manipulating JavaScript objects in object groups, allowing for the bypassing of security checks within these groups. *Note: this vulnerability has only been demonstrated with UnboxedObjects, which are disabled by default on all supported releases.*. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

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