Mitigation bypass in the JavaScript: GC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
CVSS Details
- CVSS 3.1 Base Score: 9.1
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade firefox | Sep 1, 2026 | Aug 18, 2026 |
| Mfsa2026 74 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 154.0 | Aug 18, 2026 | Aug 18, 2026 |
| Mfsa2026 77 | — | Upgrade to Mozilla Firefox ESR version 153.1Upgrade to the latest version of Mozilla Firefox | Aug 18, 2026 | Aug 18, 2026 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 153.1 | Aug 18, 2026 | Aug 18, 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