Provide references for CVE-2021-26911.
Where can I find more information about CVE-2021-26911?
References are available at: https://apps.apple.com/us/app/canary-mail/id1236045954, https://census-labs.com/news/category/advisories/, https://www.openwall.com/lists/oss-security/2021/02/17/3, https://census-labs.com/news/2021/02/17/canary-mail-app-missing-certificate-validation-check-on-imap-starttls/, https://github.com/canarymail/mailcore2/commit/45acb4efbcaa57a20ac5127dc976538671fce018, http://www.openwall.com/lists/oss-security/2021/02/17/3.