A flaw was found in python-pip in the way it handled Unicode separators in git references. A remote attacker could possibly use this issue to install a different revision on a repository. The highest threat from this vulnerability is to data integrity. This is fixed in python-pip version 21.1.
access.redhat.com/errata/RHSA-2021:3254
bugzilla.redhat.com/show_bug.cgi?id=1962856
github.com/pypa/pip
github.com/pypa/pip/commit/e46bdda9711392fec0c45c1175bae6db847cb30b
github.com/pypa/pip/pull/9827
nvd.nist.gov/vuln/detail/CVE-2021-3572
packetstormsecurity.com/files/162712/USN-4961-1.txt
www.oracle.com/security-alerts/cpuapr2022.html
www.oracle.com/security-alerts/cpujul2022.html