diff --git a/SOURCES/CVE-2021-33503.patch b/SOURCES/CVE-2021-33503.patch
new file mode 100644
index 0000000..d7a8b01
--- /dev/null
+++ b/SOURCES/CVE-2021-33503.patch
@@ -0,0 +1,42 @@
+From 6d2dcef3427b96c36ddfebf217f774a2c5ecad38 Mon Sep 17 00:00:00 2001
+From: Lumir Balhar <lbalhar@redhat.com>
+Date: Wed, 30 Jun 2021 09:27:07 +0200
+Subject: [PATCH] CVE-2021-33503
+
+---
+ src/pip/_vendor/urllib3/util/url.py | 8 +++++---
+ 1 file changed, 5 insertions(+), 3 deletions(-)
+
+diff --git a/src/pip/_vendor/urllib3/util/url.py b/src/pip/_vendor/urllib3/util/url.py
+index 5fe37a7..addaeb7 100644
+--- a/src/pip/_vendor/urllib3/util/url.py
++++ b/src/pip/_vendor/urllib3/util/url.py
+@@ -63,12 +63,12 @@ IPV6_ADDRZ_RE = re.compile("^" + IPV6_ADDRZ_PAT + "$")
+ BRACELESS_IPV6_ADDRZ_RE = re.compile("^" + IPV6_ADDRZ_PAT[2:-2] + "$")
+ ZONE_ID_RE = re.compile("(" + ZONE_ID_PAT + r")\]$")
+ 
+-SUBAUTHORITY_PAT = (u"^(?:(.*)@)?(%s|%s|%s)(?::([0-9]{0,5}))?$") % (
++_HOST_PORT_PAT = ("^(%s|%s|%s)(?::([0-9]{0,5}))?$") % (
+     REG_NAME_PAT,
+     IPV4_PAT,
+     IPV6_ADDRZ_PAT,
+ )
+-SUBAUTHORITY_RE = re.compile(SUBAUTHORITY_PAT, re.UNICODE | re.DOTALL)
++_HOST_PORT_RE = re.compile(_HOST_PORT_PAT, re.UNICODE | re.DOTALL)
+ 
+ UNRESERVED_CHARS = set(
+     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._-~"
+@@ -374,7 +374,9 @@ def parse_url(url):
+             scheme = scheme.lower()
+ 
+         if authority:
+-            auth, host, port = SUBAUTHORITY_RE.match(authority).groups()
++            auth, _, host_port = authority.rpartition("@")
++            auth = auth or None
++            host, port = _HOST_PORT_RE.match(host_port).groups()
+             if auth and normalize_uri:
+                 auth = _encode_invalid_chars(auth, USERINFO_CHARS)
+             if port == "":
+-- 
+2.31.1
+
diff --git a/SPECS/python3x-pip.spec b/SPECS/python3x-pip.spec
index 25fb8d3..9e181e6 100644
--- a/SPECS/python3x-pip.spec
+++ b/SPECS/python3x-pip.spec
@@ -16,7 +16,7 @@ Name:           python3x-%{srcname}
 # When updating, update the bundled libraries versions bellow!
 # You can use vendor_meta.sh in the dist git repo
 Version:        19.3.1
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        A tool for installing and managing Python packages
 
 # We bundle a lot of libraries with pip, which itself is under MIT license.
@@ -96,6 +96,11 @@ Patch5:         network-tests.patch
 # Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1962856
 Patch6:         CVE-2021-3572.patch
 
+# CVE-2021-33503 Catastrophic backtracking in URL authority parser
+# Tracking bug: https://bugzilla.redhat.com/show_bug.cgi?id=1968074
+# Upstream fix: https://github.com/urllib3/urllib3/commit/2d4a3fee6de2fa45eb82169361918f759269b4ec
+Patch7:         CVE-2021-33503.patch
+
 # Downstream only patch
 # Users might have local installations of pip from using
 # `pip install --user --upgrade pip` on older/newer versions.
@@ -248,6 +253,7 @@ popd
 %patch4 -p1
 %patch5 -p1
 %patch6 -p1
+%patch7 -p1
 
 # this goes together with patch4
 rm src/pip/_vendor/certifi/*.pem
@@ -409,6 +415,10 @@ fi
 %{python_wheeldir}/%{python_wheelname}
 
 %changelog
+* Wed Jun 30 2021 Lumír Balhar <lbalhar@redhat.com> - 19.3.1-3
+- Fix for CVE-2021-33503 Catastrophic backtracking in URL authority parser
+Resolves: rhbz#1968074
+
 * Tue Jun 08 2021 Lumír Balhar <lbalhar@redhat.com> - 19.3.1-2
 - Fix for CVE-2021-3572 - pip incorrectly handled unicode separators in git references
 Resolves: rhbz#1962856