CVE-2022-29916 Information

Description

Firefox behaved slightly differently for already known resources when loading CSS resources involving CSS variables. This could have been used to probe the browser history. This vulnerability affects Thunderbird < 91.9 Firefox ESR < 91.9 and Firefox < 100.

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1760674 https://www.mozilla.org/security/advisories/mfsa2022-17/ https://www.mozilla.org/security/advisories/mfsa2022-16/ https://www.mozilla.org/security/advisories/mfsa2022-18/