Provide references for CVE-2021-40978.
Where can I find more information about CVE-2021-40978?
References are available at: https://github.com/mkdocs/mkdocs, https://github.com/nisdn/CVE-2021-40978, https://github.com/mkdocs/mkdocs/issues/2601, https://github.com/nisdn/CVE-2021-40978/issues/1.