Merge pull request from GHSA-v845-jxx5-vc9f

CHANGES.rst

@@ -1,3 +1,8 @@
+2.0.6 (2023-10-02)
+==================
+
+* Added the ``Cookie`` header to the list of headers to strip from requests when redirecting to a different host. As before, different headers can be set via ``Retry.remove_headers_on_redirect``.
+
 2.0.5 (2023-09-20)
 ==================
 

docs/user-guide.rst

@@ -238,6 +238,9 @@ the ``;`` delimited key-value pairs:
     print(resp.json())
     # {"cookies": {"id": "30", "session": "f3efe9db"}}  
 
+Note that the ``Cookie`` header will be stripped if the server redirects to a
+different host.
+
 Cookies provided by the server are stored in the ``Set-Cookie`` header:
 
 .. code-block:: python

src/urllib3/util/retry.py

@@ -187,7 +187,7 @@ class Retry:
     RETRY_AFTER_STATUS_CODES = frozenset([413, 429, 503])
 
     #: Default headers to be used for ``remove_headers_on_redirect``
-    DEFAULT_REMOVE_HEADERS_ON_REDIRECT = frozenset(["Authorization"])
+    DEFAULT_REMOVE_HEADERS_ON_REDIRECT = frozenset(["Cookie", "Authorization"])
 
     #: Default maximum backoff time.
     DEFAULT_BACKOFF_MAX = 120

test/test_retry.py

@@ -334,12 +334,12 @@ def test_retry_method_not_allowed(self) -> None:
     def test_retry_default_remove_headers_on_redirect(self) -> None:
         retry = Retry()
 
-        assert list(retry.remove_headers_on_redirect) == ["authorization"]
+        assert retry.remove_headers_on_redirect == {"authorization", "cookie"}
 
     def test_retry_set_remove_headers_on_redirect(self) -> None:
         retry = Retry(remove_headers_on_redirect=["X-API-Secret"])
 
-        assert list(retry.remove_headers_on_redirect) == ["x-api-secret"]
+        assert retry.remove_headers_on_redirect == {"x-api-secret"}
 
     @pytest.mark.parametrize("value", ["-1", "+1", "1.0", "\xb2"])  # \xb2 = ^2
     def test_parse_retry_after_invalid(self, value: str) -> None:

test/with_dummyserver/test_poolmanager.py

@@ -141,20 +141,21 @@ def test_redirect_cross_host_remove_headers(self) -> None:
                 "GET",
                 f"{self.base_url}/redirect",
                 fields={"target": f"{self.base_url_alt}/headers"},
-                headers={"Authorization": "foo"},
+                headers={"Authorization": "foo", "Cookie": "foo=bar"},
             )
 
             assert r.status == 200
 
             data = r.json()
 
             assert "Authorization" not in data
+            assert "Cookie" not in data
 
             r = http.request(
                 "GET",
                 f"{self.base_url}/redirect",
                 fields={"target": f"{self.base_url_alt}/headers"},
-                headers={"authorization": "foo"},
+                headers={"authorization": "foo", "cookie": "foo=bar"},
             )
 
             assert r.status == 200
@@ -163,14 +164,16 @@ def test_redirect_cross_host_remove_headers(self) -> None:
 
             assert "authorization" not in data
             assert "Authorization" not in data
+            assert "cookie" not in data
+            assert "Cookie" not in data
 
     def test_redirect_cross_host_no_remove_headers(self) -> None:
         with PoolManager() as http:
             r = http.request(
                 "GET",
                 f"{self.base_url}/redirect",
                 fields={"target": f"{self.base_url_alt}/headers"},
-                headers={"Authorization": "foo"},
+                headers={"Authorization": "foo", "Cookie": "foo=bar"},
                 retries=Retry(remove_headers_on_redirect=[]),
             )
 
@@ -179,14 +182,19 @@ def test_redirect_cross_host_no_remove_headers(self) -> None:
             data = r.json()
 
             assert data["Authorization"] == "foo"
+            assert data["Cookie"] == "foo=bar"
 
     def test_redirect_cross_host_set_removed_headers(self) -> None:
         with PoolManager() as http:
             r = http.request(
                 "GET",
                 f"{self.base_url}/redirect",
                 fields={"target": f"{self.base_url_alt}/headers"},
-                headers={"X-API-Secret": "foo", "Authorization": "bar"},
+                headers={
+                    "X-API-Secret": "foo",
+                    "Authorization": "bar",
+                    "Cookie": "foo=bar",
+                },
                 retries=Retry(remove_headers_on_redirect=["X-API-Secret"]),
             )
 
@@ -196,8 +204,13 @@ def test_redirect_cross_host_set_removed_headers(self) -> None:
 
             assert "X-API-Secret" not in data
             assert data["Authorization"] == "bar"
+            assert data["Cookie"] == "foo=bar"
 
-            headers = {"x-api-secret": "foo", "authorization": "bar"}
+            headers = {
+                "x-api-secret": "foo",
+                "authorization": "bar",
+                "cookie": "foo=bar",
+            }
             r = http.request(
                 "GET",
                 f"{self.base_url}/redirect",
@@ -213,9 +226,14 @@ def test_redirect_cross_host_set_removed_headers(self) -> None:
             assert "x-api-secret" not in data
             assert "X-API-Secret" not in data
             assert data["Authorization"] == "bar"
+            assert data["Cookie"] == "foo=bar"
 
             # Ensure the header argument itself is not modified in-place.
-            assert headers == {"x-api-secret": "foo", "authorization": "bar"}
+            assert headers == {
+                "x-api-secret": "foo",
+                "authorization": "bar",
+                "cookie": "foo=bar",
+            }
 
     def test_redirect_without_preload_releases_connection(self) -> None:
         with PoolManager(block=True, maxsize=2) as http: