| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 115.9.0< 124.0 | 115.9.0124.0 |
| thunderbird | < 115.9.0 | 115.9.0 |
`AppendEncodedAttributeValue(), ExtraSpaceNeededForAttrEncoding()` and `AppendEncodedCharacters()` could have experienced integer overflows, causing underallocation of an output buffer leading to an out of bounds write. This vulnerability affects Firefox < 124, Firefox ESR < 115.9, and Thunderbird < 115.9.
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