Provide references for CVE-2020-1900.
Where can I find more information about CVE-2020-1900?
References are available at: https://hhvm.com/blog/2020/06/30/security-update.html, https://github.com/facebook/hhvm/commit/c1c4bb0cf9e076aafaf4ff3515556ef9faf906f3.