Privilege escalation in the DOM: Networking component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade thunderbirdUpgrade firefox-x11Upgrade firefox | Oct 11, 2026 | Aug 24, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade firefox | Sep 1, 2026 | Aug 18, 2026 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Aug 20, 2026 | Aug 20, 2026 |
| Mfsa2026 74 | — | Upgrade to Mozilla Firefox version 154.0Upgrade to the latest version of Mozilla Firefox | Aug 18, 2026 | Aug 18, 2026 |
| Mfsa2026 75 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 115.39 | Aug 18, 2026 | Aug 18, 2026 |
| Mfsa2026 76 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 140.14 | 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 |
| Redhat_linux | — | Upgrade thunderbird-debugsourceUpgrade thunderbirdUpgrade firefox-x11Upgrade firefoxUpgrade firefox-debugsourceUpgrade thunderbird-debuginfoNo solution existsUpgrade firefox-debuginfo | Aug 20, 2026 | Aug 18, 2026 |
| Rocky_linux | — | Upgrade firefox-debugsourceUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade thunderbirdUpgrade firefoxUpgrade firefox-x11 | Aug 26, 2026 | Aug 25, 2026 |
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