| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 128.8.0< 136.0 | 128.8.0136.0 |
| thunderbird | ≥ 129.0, < 136.0< 128.8.0 | 136.0128.8.0 |
A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.
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