Memory safety bugs present in Firefox 149.0.1 and Thunderbird 149.0.1. 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 149.0.2 and Thunderbird 149.0.2.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Freebsd | — | Upgrade firefoxUpgrade thunderbird | Apr 10, 2026 | Apr 9, 2026 |
| Mfsa2026 25 | — | Upgrade to Mozilla Firefox version 149.0.2Upgrade to the latest version of Mozilla Firefox | Apr 8, 2026 | Apr 7, 2026 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 149.0.2 | Apr 8, 2026 | Apr 7, 2026 |
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