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Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade firefox | Oct 19, 2026 | Oct 19, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade firefox | Oct 13, 2026 | Sep 29, 2026 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Oct 1, 2026 | Sep 29, 2026 |
| Mfsa2026 100 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 153.4 | Sep 29, 2026 | Sep 29, 2026 |
| Mfsa2026 97 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 157.0 | Sep 29, 2026 | Sep 29, 2026 |
| Mfsa2026 99 | — | Upgrade to Mozilla Firefox ESR version 140.17Upgrade to the latest version of Mozilla Firefox | Sep 29, 2026 | Sep 29, 2026 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 153.4Upgrade to the latest version of Mozilla Thunderbird | Sep 30, 2026 | Sep 30, 2026 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-x11 | Oct 22, 2026 | Sep 29, 2026 |
| Redhat_linux | — | No solution exists | Oct 19, 2026 | Sep 29, 2026 |
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