Ervin Hegedues discovered that ModSecurity v3 enabled global regular expression matching which could result in denial of service. For additional information please refer to coreruleset.org/20200914/cve-2020-15598/ For the stable distribution (buster), this problem has been fixed in version 3.0.3-1+deb10u2. We recommend that you upgrade your modsecurity packages. For the detailed security status of modsecurity please refer to its security tracker page at: security-tracker.debian.org/tracker/modsecurity