Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
CVSS Details
- CVSS 3.1 Base Score: 9.6
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade thunderbird | May 31, 2026 | May 27, 2026 |
| Mfsa2026 46 | — | Upgrade to Mozilla Firefox version 151.0 | May 19, 2026 | May 19, 2026 |
| Mfsa2026 48 | — | Upgrade to Mozilla Firefox ESR version 140.11 | May 19, 2026 | May 19, 2026 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.11 | May 20, 2026 | May 19, 2026 |
| Oracle_linux | — | Upgrade thunderbird | Jun 5, 2026 | May 19, 2026 |
| Redhat_linux | — | Upgrade thunderbirdUpgrade thunderbird-debugsourceNo solution existsUpgrade thunderbird-debuginfo | Jun 3, 2026 | May 19, 2026 |
| Rocky_linux | — | Upgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade thunderbird-debugsource | Jun 1, 2026 | May 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