| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 100.0 | 100.0 |
| firefox esr | < 91.9 | 91.9 |
| thunderbird | < 91.9 | 91.9 |
Documents in deeply-nested cross-origin browsing contexts could have obtained permissions granted to the top-level origin, bypassing the existing prompt and wrongfully inheriting the top-level permissions. This vulnerability affects Thunderbird < 91.9, Firefox ESR < 91.9, and Firefox < 100.
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