9.8
Critical
CVE-2026-16411 Memory safety bugs present in Thunderbird 152
Description
Memory safety bugs present in Thunderbird 152. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 153 | earliest → < 153 | 153 |
| Thunderbird 153 | earliest → < 153 | 153 |
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