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If a user visited a webpage with an invalid TLS certificate, and granted an exception, the webpage was able to provide a WebAuthn challenge that the user would be prompted to complete. This is in violation of the WebAuthN spec which requires "a secure transport established without errors". This vulnerability was fixed in Firefox 140 and Thunderbird 140.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Freebsd | — | Upgrade firefox | Jul 5, 2025 | Jul 4, 2025 |
| Mfsa2025 51 | — | Upgrade to Mozilla Firefox version 140.0Upgrade to the latest version of Mozilla Firefox | Jun 25, 2025 | Jun 24, 2025 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.0Upgrade to the latest version of Mozilla Thunderbird | Jul 3, 2025 | Jun 24, 2025 |
| Suse | — | Upgrade pipewireUpgrade MozillaThunderbird-translations-commonUpgrade xdg-desktop-portal-langUpgrade xdg-desktop-portalUpgrade mozillafirefox-branding-upstreamUpgrade pipewire-spa-toolsUpgrade libpipewire-0_3-0Upgrade MozillaFirefox-translations-otherUpgrade MozillaThunderbird-translations-otherUpgrade pipewire-modules-0_3Upgrade pipewire-modulesUpgrade pipewire-toolsUpgrade MozillaThunderbirdUpgrade pipewire-spa-plugins-0_2Upgrade gstreamer-plugin-pipewireUpgrade pipewire-langUpgrade xdg-desktop-portal-develUpgrade MozillaFirefox-translations-commonUpgrade MozillaFirefoxUpgrade MozillaFirefox-develUpgrade mozillafirefox-branding-sle | Jul 22, 2025 | Jun 24, 2025 |
| Ubuntu | — | Upgrade thunderbird | Jun 26, 2025 | Jun 24, 2025 |
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