| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 52.6.0 | 52.6.0 |
| thunderbird | < 52.6.0 | 52.6.0 |
A use-after-free vulnerability can occur while editing events in form elements on a page, resulting in a potentially exploitable crash. This vulnerability affects Firefox ESR < 52.6 and Thunderbird < 52.6.
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