diff --git a/CVE-2023-30861.patch b/CVE-2023-30861.patch
new file mode 100644
index 0000000000000000000000000000000000000000..6459f755d34eb99e380fc079171f491de34db54f
--- /dev/null
+++ b/CVE-2023-30861.patch
@@ -0,0 +1,97 @@
+From 3fddbbeaa006ba299cf8e8356618a1d9043091eb Mon Sep 17 00:00:00 2001
+From: starlet-dx <15929766099@163.com>
+Date: Thu, 11 May 2023 15:46:45 +0800
+Subject: [PATCH 1/1] set `Vary: Cookie` header consistently for session
+
+Origin:
+https://github.com/pallets/flask/commit/8646edca6f47e2cd57464081b3911218d4734f8d
+
+---
+ src/flask/sessions.py | 10 ++++++----
+ tests/test_basic.py   | 23 +++++++++++++++++++++++
+ 2 files changed, 29 insertions(+), 4 deletions(-)
+
+diff --git a/src/flask/sessions.py b/src/flask/sessions.py
+index 4e19270..039e30c 100644
+--- a/src/flask/sessions.py
++++ b/src/flask/sessions.py
+@@ -385,6 +385,10 @@ class SecureCookieSessionInterface(SessionInterface):
+         samesite = self.get_cookie_samesite(app)
+         httponly = self.get_cookie_httponly(app)
+ 
++        # Add a "Vary: Cookie" header if the session was accessed at all.
++        if session.accessed:
++            response.vary.add("Cookie")
++
+         # If the session is modified to be empty, remove the cookie.
+         # If the session is empty, return without setting the cookie.
+         if not session:
+@@ -397,13 +401,10 @@ class SecureCookieSessionInterface(SessionInterface):
+                     samesite=samesite,
+                     httponly=httponly,
+                 )
++                response.vary.add("Cookie")
+ 
+             return
+ 
+-        # Add a "Vary: Cookie" header if the session was accessed at all.
+-        if session.accessed:
+-            response.vary.add("Cookie")
+-
+         if not self.should_set_cookie(app, session):
+             return
+ 
+@@ -419,3 +420,4 @@ class SecureCookieSessionInterface(SessionInterface):
+             secure=secure,
+             samesite=samesite,
+         )
++        response.vary.add("Cookie")
+diff --git a/tests/test_basic.py b/tests/test_basic.py
+index 3dc3a0e..6cf1496 100644
+--- a/tests/test_basic.py
++++ b/tests/test_basic.py
+@@ -555,6 +555,11 @@ def test_session_vary_cookie(app, client):
+     def setdefault():
+         return flask.session.setdefault("test", "default")
+ 
++    @app.route("/clear")
++    def clear():
++        flask.session.clear()
++        return ""
++
+     @app.route("/vary-cookie-header-set")
+     def vary_cookie_header_set():
+         response = flask.Response()
+@@ -587,11 +592,29 @@ def test_session_vary_cookie(app, client):
+     expect("/get")
+     expect("/getitem")
+     expect("/setdefault")
++    expect("/clear")
+     expect("/vary-cookie-header-set")
+     expect("/vary-header-set", "Accept-Encoding, Accept-Language, Cookie")
+     expect("/no-vary-header", None)
+ 
+ 
++def test_session_refresh_vary(app, client):
++    @app.get("/login")
++    def login():
++        flask.session["user_id"] = 1
++        flask.session.permanent = True
++        return ""
++
++    @app.get("/ignored")
++    def ignored():
++        return ""
++
++    rv = client.get("/login")
++    assert rv.headers["Vary"] == "Cookie"
++    rv = client.get("/ignored")
++    assert rv.headers["Vary"] == "Cookie"
++
++
+ def test_flashes(app, req_ctx):
+     assert not flask.session.modified
+     flask.flash("Zap")
+-- 
+2.30.0
+
diff --git a/python-flask.spec b/python-flask.spec
index c898763dad393a68b9ad352c6a12776f62ef95f3..8c13a193d180e916b3a0a52e304b0c2e17404986 100644
--- a/python-flask.spec
+++ b/python-flask.spec
@@ -1,6 +1,6 @@
 Name:            python-flask
 Version:         2.1.2
-Release:         3
+Release:         4
 Epoch:           1
 Summary:         A lightweight WSGI web application framework
 License:         BSD-3-Clause
@@ -8,6 +8,7 @@ URL:             https://palletsprojects.com/p/flask/
 Source0:         https://files.pythonhosted.org/packages/source/F/Flask/Flask-%{version}.tar.gz
 Patch0:          Fix-linting-error.patch
 Patch1:          Fix-incorrect-references-to-query-in-testing-doc.patch
+Patch2:          CVE-2023-30861.patch
 
 BuildArch:       noarch
 
@@ -54,6 +55,9 @@ PYTHONPATH=%{buildroot}%{python3_sitelib} py.test-%{python3_version} -v || :
 %{python3_sitelib}/*
 
 %changelog
+* Thu May 11 2023 yaoxin <yao_xin001@hoperun.com> - 1:2.1.2-4
+- Fix CVE-2023-30861
+
 * Fri Jan 13 2023 zhangliangpengkun<zhangliangpengkun@xfusion.com> - 1:2.1.2-3
 - Fix incorrect references to query in testing doc