Only Firefox advisories out so far with CVE-2021-{38503..38509} and MOZ-2021-{0004..0008}.
https://www.mozilla.org/en-US/security/advisories/mfsa2021-48/ https://www.mozilla.org/en-US/security/advisories/mfsa2021-49/
Thunderbird advisory: https://www.mozilla.org/en-US/security/advisories/mfsa2021-50/