python-urllib3: Catastrophic backtracking in URL authority parser when passed URL containing many @ characters https://github.com/urllib3/urllib3/security/advisories/GHSA-q2q7-5pp4-w6pg CREATE(Triage):(User=admin) CVE-2021-33503 (https://nvd.nist.gov/vuln/detail/CVE-2021-33503)
