An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. An integer overflow problem allows a remote server to achieve Denial of Service when delivering responses to HTTP Range requests. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent.
https://security.netapp.com/advisory/ntap-20210716-0007/
https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html
https://github.com/squid-cache/squid/security/advisories/GHSA-pxwq-f3qr-w2xf