Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-x11 | Mar 31, 2026 | Mar 26, 2026 |
| Amazon Linux Ami 2 | — | Upgrade firefoxUpgrade thunderbird | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefoxUpgrade firefox-debuginfoUpgrade firefox-debugsource | Apr 14, 2026 | Mar 24, 2026 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Mar 30, 2026 | Mar 30, 2026 |
| Freebsd | — | Upgrade thunderbirdUpgrade firefox | Mar 27, 2026 | Mar 26, 2026 |
| Mfsa2026 20 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 149.0 | Mar 27, 2026 | Mar 24, 2026 |
| Mfsa2026 22 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 140.9 | Mar 27, 2026 | Mar 24, 2026 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 140.9 | Mar 27, 2026 | Mar 24, 2026 |
| Oracle_linux | — | Upgrade firefoxUpgrade firefox-x11Upgrade thunderbird | Mar 30, 2026 | Mar 24, 2026 |
| Redhat_linux | — | Upgrade thunderbird-debugsourceUpgrade firefox-debuginfoUpgrade firefox-debugsourceNo solution existsUpgrade firefox-x11Upgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade firefox | Mar 27, 2026 | Mar 24, 2026 |
| Rocky_linux | — | Upgrade firefox-debuginfoUpgrade firefoxUpgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade thunderbirdUpgrade thunderbird-debugsourceUpgrade firefox-x11 | Apr 8, 2026 | Apr 7, 2026 |
| Suse | — | Upgrade mozillafirefox-branding-upstreamUpgrade MozillaThunderbird-translations-commonUpgrade MozillaFirefox-translations-otherUpgrade MozillaFirefox-develUpgrade MozillaThunderbird-openpgp-librnpUpgrade MozillaFirefoxUpgrade MozillaThunderbird-translations-otherUpgrade MozillaThunderbirdUpgrade MozillaFirefox-translations-common | Mar 30, 2026 | Mar 27, 2026 |
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