Memory safety bugs present in Firefox 147 and Thunderbird 147. 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 148 and Thunderbird 148.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Freebsd | — | Upgrade firefoxUpgrade thunderbird | Mar 2, 2026 | Feb 26, 2026 |
| Mfsa2026 13 | — | Upgrade to Mozilla Firefox version 148.0Upgrade to the latest version of Mozilla Firefox | Feb 25, 2026 | Feb 24, 2026 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 148.0Upgrade to the latest version of Mozilla Thunderbird | Feb 25, 2026 | Feb 24, 2026 |
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