8.8
High
CVE-2026-92023 Use-after-free in the XML component
Description
Use-after-free in the XML component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 156 | earliest → < 156 | 156 |
| Firefox 153.3 | earliest → < 153.3 | 153.3 |
| Firefox 140.16 | earliest → < 140.16 | 140.16 |
| Firefox 115.41 | earliest → < 115.41 | 115.41 |
| Thunderbird 156 | earliest → < 156 | 156 |
| Thunderbird 153.3 | earliest → < 153.3 | 153.3 |
| Thunderbird 140.16 | earliest → < 140.16 | 140.16 |