Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
CVSS Details
- CVSS 3.1 Base Score: 8.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Oct 1, 2026 | Sep 29, 2026 |
| Mfsa2026 100 | — | Upgrade to Mozilla Firefox ESR version 153.4Upgrade to the latest version of Mozilla Firefox | 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 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 the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 140.17 | Sep 29, 2026 | Sep 29, 2026 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 153.4 | Sep 30, 2026 | Sep 30, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub