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 the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 140.0 | 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 pipewire-spa-toolsUpgrade libpipewire-0_3-0Upgrade MozillaThunderbird-translations-commonUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefox-translations-otherUpgrade pipewire-modules-0_3Upgrade pipewireUpgrade mozillafirefox-branding-upstreamUpgrade xdg-desktop-portal-langUpgrade pipewire-modulesUpgrade xdg-desktop-portalUpgrade mozillafirefox-branding-sleUpgrade MozillaThunderbirdUpgrade gstreamer-plugin-pipewireUpgrade MozillaFirefox-develUpgrade pipewire-langUpgrade pipewire-toolsUpgrade MozillaFirefoxUpgrade MozillaFirefox-translations-commonUpgrade xdg-desktop-portal-develUpgrade pipewire-spa-plugins-0_2 | Jul 22, 2025 | Jun 24, 2025 |
| Ubuntu | — | Upgrade thunderbird | Jun 26, 2025 | Jun 24, 2025 |
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