Provide references for CVE-2021-4276.
Where can I find more information about CVE-2021-4276?
References are available at: https://vuldb.com/?id.216746, https://github.com/dns-stats/hedgehog/pull/190, https://github.com/dns-stats/hedgehog/commit/58922c345d3d1fe89bb2020111873a3e07ca93ac.