Privilege escalation in WebExtensions. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
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 |
|---|---|---|---|---|
| Alma_linux | — | Upgrade thunderbird | Aug 5, 2026 | Aug 4, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade firefox | Aug 18, 2026 | Jul 21, 2026 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Jul 23, 2026 | Jul 23, 2026 |
| Mfsa2026 68 | — | Upgrade to Mozilla Firefox version 153.0Upgrade to the latest version of Mozilla Firefox | Jul 21, 2026 | Jul 21, 2026 |
| Mfsa2026 70 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 140.13 | Jul 21, 2026 | Jul 21, 2026 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.13Upgrade to the latest version of Mozilla Thunderbird | Jul 21, 2026 | Jul 21, 2026 |
| Redhat_linux | — | Upgrade thunderbirdNo solution existsUpgrade firefox-debuginfoUpgrade firefoxUpgrade firefox-x11Upgrade thunderbird-debuginfoUpgrade firefox-debugsourceUpgrade thunderbird-debugsource | Jul 27, 2026 | Jul 21, 2026 |
| Rocky_linux | — | Upgrade thunderbird-debuginfoUpgrade thunderbird-debugsourceUpgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade thunderbirdUpgrade firefox-x11Upgrade firefox | Jul 31, 2026 | Jul 29, 2026 |
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