Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Thunderbird 140.17, Firefox 156, Firefox ESR 153.3, Thunderbird 156, Thunderbird 153.3, Firefox ESR 115.42, and Firefox ESR 140.17.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade firefox-debuginfoUpgrade firefoxUpgrade firefox-debugsource | Oct 13, 2026 | Sep 15, 2026 |
| Debian | — | Upgrade thunderbird | Oct 5, 2026 | Sep 15, 2026 |
| Mfsa2026 90 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 156.0 | Sep 15, 2026 | Sep 15, 2026 |
| Mfsa2026 93 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 153.3 | Sep 15, 2026 | Sep 15, 2026 |
| Mfsa2026 98 | — | Upgrade to Mozilla Firefox ESR version 115.42Upgrade to the latest version of Mozilla Firefox | 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 140.17Upgrade to the latest version of Mozilla Thunderbird | Sep 15, 2026 | Sep 15, 2026 |
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