| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | ≤ 60.6≤ 66.0 | |
| thunderbird | ≤ 60.6 |
A use-after-free vulnerability can occur when a raw pointer to a DOM element on a page is obtained using JavaScript and the element is then removed while still in use. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
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