8.1
High
CVE-2025-8036 Thunderbird cached CORS preflight responses across IP address changes
Description
Thunderbird cached CORS preflight responses across IP address changes. This allowed circumventing CORS with DNS rebinding. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 141 | earliest → < 141 | 141 |
| Firefox 140.1 | earliest → < 140.1 | 140.1 |
| Firefox ESR 140.1 | earliest → < 140.1 | 140.1 |
| Thunderbird 141 | earliest → < 141 | 141 |
| Thunderbird 140.1 | earliest → < 140.1 | 140.1 |