A flask security update has been released for Debian GNU/Linux 10 LTS to address an issue with the cache.

[SECURITY] [DLA 3536-1] flask security update

-------------------------------------------------------------------------
Debian LTS Advisory DLA-3536-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Sean Whitton
August 20, 2023 https://wiki.debian.org/LTS
-------------------------------------------------------------------------

Package : flask
Version : 1.0.2-3+deb10u1
CVE ID : CVE-2023-30861
Debian Bug : #1035670

It was discovered that Flask, a lightweight WSGI web application
framework, will under certain conditions cache a response containing
data intended for one client and subsequently may send the response to
other clients.

For Debian 10 buster, this problem has been fixed in version
1.0.2-3+deb10u1.

We recommend that you upgrade your flask packages.

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

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS