CVE-2021-28116	09.03.21 23:15
Squid through 4.14 and 5.x through 5.0.5, in some configurations,
allows information disclosure because of an out-of-bounds read in WCCP
protocol data. This can be leveraged as part of a chain for remote code
execution as nobody.

Upstream did not release a patch yet. CVE entry to be monitored for a
fix.

https://www.zerodayinitiative.com/advisories/ZDI-21-157/ - says it is a
low impact issue.