I've been seeing security advisory number like CESA-2017:1842, and after search I could only find some of them in mailing list archives such as this.
AFAIK, whatever applies to RHEL should apply to respective CentOS release. Read more here on the similarity part (https://unix.stackexchange.com/questions/27323/is-centos-exactly-the-same-as-rhel). 
Also best way to search for CVE is to go to https://cve.mitre.org/ and search for CVE List with keyword like "CentOS". e.g. (https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=CentOS)
Edit: In the provided first link, an answer mentions "CVEs (Common Vulnerabilities and Exposures) are not tested on CentOS, and it is expensive to test them properly." I didn't got any source to verify this claim.