Debian 11: DSA-5146-1 Critical: Puma Information Disclosure Issue

Multiple security vulnerabilities were discovered in Puma, a HTTP server
for Ruby/Rack applications, which could result in HTTP request smuggling
or information disclosure.

For the stable distribution (bullseye), this problem has been fixed in
version 4.3.8-1+deb11u2.

We recommend that you upgrade your puma packages.

For the detailed security status of puma please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/puma

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/