6.5
Medium
CVE-2026-12302 Mitigation bypass in the DOM: Security component
Description
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 152 | earliest → < 152 | 152 |
| Firefox 140.12 | earliest → < 140.12 | 140.12 |
| Firefox 115.37 | earliest → < 115.37 | 115.37 |
| Thunderbird 152 | earliest → < 152 | 152 |
| Thunderbird 140.12 | earliest → < 140.12 | 140.12 |
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