From accff72ecc2f6cf5a76d9570198a93ac7c90270e Mon Sep 17 00:00:00 2001
From: Quentin Pradet <quentin.pradet@gmail.com>
Date: Mon, 17 Jun 2024 11:09:06 +0400
Subject: [PATCH] Merge pull request from GHSA-34jh-p97f-mpxf

* Strip Proxy-Authorization header on redirects

---
 src/pip/_vendor/urllib3/util/retry.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/pip/_vendor/urllib3/util/retry.py b/src/pip/_vendor/urllib3/util/retry.py
index c7c0427..7e438b9 100644
--- a/src/pip/_vendor/urllib3/util/retry.py
+++ b/src/pip/_vendor/urllib3/util/retry.py
@@ -217,7 +217,9 @@ class Retry(object):
     RETRY_AFTER_STATUS_CODES = frozenset([413, 429, 503])
 
     #: Default headers to be used for ``remove_headers_on_redirect``
-    DEFAULT_REMOVE_HEADERS_ON_REDIRECT = frozenset(["Cookie", "Authorization"])
+    DEFAULT_REMOVE_HEADERS_ON_REDIRECT = frozenset(
+        ["Cookie", "Authorization", "Proxy-Authorization"]
+    )
 
     #: Maximum backoff time.
     BACKOFF_MAX = 120
-- 
2.33.0