diff -Nru python-future-0.18.2/debian/changelog python-future-0.18.2/debian/changelog
--- python-future-0.18.2/debian/changelog	2022-05-25 19:40:53.000000000 +0000
+++ python-future-0.18.2/debian/changelog	2023-01-25 08:40:55.000000000 +0000
@@ -1,3 +1,12 @@
+python-future (0.18.2-6ubuntu1) lunar; urgency=medium
+
+  * SECURITY UPDATE: ReDOS through Set-Cookie header
+    - debian/patches/CVE-2022-40899.patch: Fix overlapping \s*
+      regex groups in src/future/backports/http/cookiejar.py. 
+    - CVE-2022-40899
+
+ -- David Fernandez Gonzalez <david.fernandezgonzalez@canonical.com>  Wed, 25 Jan 2023 09:40:55 +0100
+
 python-future (0.18.2-6) unstable; urgency=medium
 
   * Set upstream metadata fields: Repository, Repository-Browse.
diff -Nru python-future-0.18.2/debian/control python-future-0.18.2/debian/control
--- python-future-0.18.2/debian/control	2022-05-25 19:40:53.000000000 +0000
+++ python-future-0.18.2/debian/control	2023-01-25 08:40:55.000000000 +0000
@@ -1,7 +1,8 @@
 Source: python-future
 Section: python
 Priority: optional
-Maintainer: Debian Python Team <team+python@tracker.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian Python Team <team+python@tracker.debian.org>
 Uploaders: Vincent Bernat <bernat@debian.org>
 Build-Depends: debhelper-compat (= 13),
                dh-python,
diff -Nru python-future-0.18.2/debian/patches/CVE-2022-40899.patch python-future-0.18.2/debian/patches/CVE-2022-40899.patch
--- python-future-0.18.2/debian/patches/CVE-2022-40899.patch	1970-01-01 00:00:00.000000000 +0000
+++ python-future-0.18.2/debian/patches/CVE-2022-40899.patch	2023-01-25 08:40:55.000000000 +0000
@@ -0,0 +1,52 @@
+From c91d70b34ef0402aef3e9d04364ba98509dca76f Mon Sep 17 00:00:00 2001
+From: Will Shanks <wshaos@posteo.net>
+Date: Fri, 23 Dec 2022 13:38:26 -0500
+Subject: [PATCH] Backport fix for bpo-38804
+
+The regex http.cookiejar.LOOSE_HTTP_DATE_RE was vulnerable to regular
+expression denial of service (REDoS). The regex contained multiple
+overlapping \s* capture groups. A long sequence of spaces can trigger
+bad performance.
+
+See https://github.com/python/cpython/pull/17157 and https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages/
+---
+ src/future/backports/http/cookiejar.py | 18 ++++++++++++------
+ 1 file changed, 12 insertions(+), 6 deletions(-)
+
+diff --git a/src/future/backports/http/cookiejar.py b/src/future/backports/http/cookiejar.py
+index af3ef415..0ad80a02 100644
+--- a/src/future/backports/http/cookiejar.py
++++ b/src/future/backports/http/cookiejar.py
+@@ -225,10 +225,14 @@ def _str2time(day, mon, yr, hr, min, sec, tz):
+        (?::(\d\d))?    # optional seconds
+     )?                 # optional clock
+        \s*
+-    ([-+]?\d{2,4}|(?![APap][Mm]\b)[A-Za-z]+)? # timezone
++    (?:
++       ([-+]?\d{2,4}|(?![APap][Mm]\b)[A-Za-z]+) # timezone
++       \s*
++    )?
++    (?:
++       \(\w+\)         # ASCII representation of timezone in parens.
+        \s*
+-    (?:\(\w+\))?       # ASCII representation of timezone in parens.
+-       \s*$""", re.X | re.ASCII)
++    )?$""", re.X | re.ASCII)
+ def http2time(text):
+     """Returns time in seconds since epoch of time represented by a string.
+ 
+@@ -298,9 +302,11 @@ def http2time(text):
+       (?::?(\d\d(?:\.\d*)?))?  # optional seconds (and fractional)
+    )?                    # optional clock
+       \s*
+-   ([-+]?\d\d?:?(:?\d\d)?
+-    |Z|z)?               # timezone  (Z is "zero meridian", i.e. GMT)
+-      \s*$""", re.X | re. ASCII)
++   (?:
++      ([-+]?\d\d?:?(:?\d\d)?
++       |Z|z)             # timezone  (Z is "zero meridian", i.e. GMT)
++      \s*
++   )?$""", re.X | re. ASCII)
+ def iso2time(text):
+     """
+     As for http2time, but parses the ISO 8601 formats:
diff -Nru python-future-0.18.2/debian/patches/series python-future-0.18.2/debian/patches/series
--- python-future-0.18.2/debian/patches/series	2022-05-25 19:40:53.000000000 +0000
+++ python-future-0.18.2/debian/patches/series	2023-01-25 08:40:55.000000000 +0000
@@ -4,3 +4,4 @@
 0005-Fixed-bytes-unit-tests-fail-on-Python-3.5.patch
 #Python3.7-support.patch
 no-dummy-thread.patch
+CVE-2022-40899.patch