A fish security update has been released for Debian GNU/Linux to address an arbitrary code execution vulnerability.

DSA 5234-1: fish security update

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Debian Security Advisory DSA-5234-1 security@debian.org
  https://www.debian.org/security/ Aron Xu
September 21, 2022   https://www.debian.org/security/faq
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Package : fish
CVE ID : CVE-2022-20001

An arbitrary code execution vulnerability was disovered in fish, a
command line shell. When using the default configuraton of fish,
changing to a directory automatically ran `git` commands in order to
display information about the current repository in the prompt. Such
repositories can contain per-repository configuration that change the
behavior of git, including running arbitrary commands.

For the stable distribution (bullseye), this problem has been fixed in
version 3.1.2-3+deb11u1.

We recommend that you upgrade your fish packages.

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

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/