A varnish security update has been released for Debian GNU/Linux 11 to address an HTTP/2 request forgery vulnerability.

DSA 5334-1: varnish security update

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Debian Security Advisory DSA-5334-1 security@debian.org
  https://www.debian.org/security/ Salvatore Bonaccorso
January 29, 2023   https://www.debian.org/security/faq
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Package : varnish
CVE ID : CVE-2022-45060
Debian Bug : 1023751

Martin van Kervel Smedshammer discovered that varnish, a state of the
art, high-performance web accelerator, is prone to a HTTP/2 request
forgery vulnerability.

See   https://varnish-cache.org/security/VSV00011.html for details.

For the stable distribution (bullseye), this problem has been fixed in
version 6.5.1-1+deb11u3.

We recommend that you upgrade your varnish packages.

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

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/