Several vulnerabilities have been found in the Apache HTTP server, which could result in denial of service. In addition the implementation of the MergeSlashes option could result in unexpected behaviour.
For the stable distribution (buster), these problems have been fixed in version 2.4.38-3+deb10u5.
We recommend that you upgrade your apache2 packages.
Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/