Apache Traffic Server reuses multiplexed HTTP/2 origin connections without verifying the server certificate covers the new request hostname. This issue affects Apache Traffic Server: from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.
5.3.0-2ubuntu15.3.0-2ubuntu27.0.0-57.1.2+ds-27.1.2+ds-2build17.1.2+ds-3Exploitability
AV:NAC:LAT:PPR:NUI:NVulnerable System
VC:NVI:NVA:NSubsequent System
SC:LSI:LSA:NCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N