2018-03: Crafted zone record can cause a denial of service (CVE-2018-10851) https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2018-03.html 2018-05: Packet cache pollution via crafted query (CVE-2018-14626) https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2018-05.html