Squid is vulnerable to denial of service (DoS). Due to an improper check for new member in ESIExpression::Evaluate allows for stack buffer overflow.
lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html
www.openwall.com/lists/oss-security/2020/04/23/1
access.redhat.com/errata/RHSA-2020:2040
access.redhat.com/security/updates/classification/#important
gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12519.txt
lists.debian.org/debian-lts-announce/2020/07/msg00009.html
security.gentoo.org/glsa/202005-05
security.netapp.com/advisory/ntap-20210205-0006/
usn.ubuntu.com/4356-1/
www.debian.org/security/2020/dsa-4682