diff --git a/lib/urllib3/_version.py b/lib/urllib3/_version.py
index 308d7f28..7c031661 100644
--- a/lib/urllib3/_version.py
+++ b/lib/urllib3/_version.py
@@ -1,2 +1,2 @@
 # This file is protected via CODEOWNERS
-__version__ = "1.26.13"
+__version__ = "1.26.14"
diff --git a/lib/urllib3/contrib/appengine.py b/lib/urllib3/contrib/appengine.py
index f91bdd6e..a5a6d910 100644
--- a/lib/urllib3/contrib/appengine.py
+++ b/lib/urllib3/contrib/appengine.py
@@ -224,7 +224,7 @@ class AppEngineManager(RequestMethods):
                 )
 
         # Check if we should retry the HTTP response.
-        has_retry_after = bool(http_response.getheader("Retry-After"))
+        has_retry_after = bool(http_response.headers.get("Retry-After"))
         if retries.is_retry(method, http_response.status, has_retry_after):
             retries = retries.increment(method, url, response=http_response, _pool=self)
             log.debug("Retry: %s", url)
diff --git a/lib/urllib3/contrib/ntlmpool.py b/lib/urllib3/contrib/ntlmpool.py
index 41a8fd17..47166575 100644
--- a/lib/urllib3/contrib/ntlmpool.py
+++ b/lib/urllib3/contrib/ntlmpool.py
@@ -69,7 +69,7 @@ class NTLMConnectionPool(HTTPSConnectionPool):
         log.debug("Request headers: %s", headers)
         conn.request("GET", self.authurl, None, headers)
         res = conn.getresponse()
-        reshdr = dict(res.getheaders())
+        reshdr = dict(res.headers)
         log.debug("Response status: %s %s", res.status, res.reason)
         log.debug("Response headers: %s", reshdr)
         log.debug("Response data: %s [...]", res.read(100))
@@ -101,7 +101,7 @@ class NTLMConnectionPool(HTTPSConnectionPool):
         conn.request("GET", self.authurl, None, headers)
         res = conn.getresponse()
         log.debug("Response status: %s %s", res.status, res.reason)
-        log.debug("Response headers: %s", dict(res.getheaders()))
+        log.debug("Response headers: %s", dict(res.headers))
         log.debug("Response data: %s [...]", res.read()[:100])
         if res.status != 200:
             if res.status == 401:
diff --git a/lib/urllib3/response.py b/lib/urllib3/response.py
index 8f1b4fa8..0bd13d40 100644
--- a/lib/urllib3/response.py
+++ b/lib/urllib3/response.py
@@ -666,7 +666,7 @@ class HTTPResponse(io.IOBase):
     def getheaders(self):
         warnings.warn(
             "HTTPResponse.getheaders() is deprecated and will be removed "
-            "in urllib3 v2.1.0. Instead access HTTResponse.headers directly.",
+            "in urllib3 v2.1.0. Instead access HTTPResponse.headers directly.",
             category=DeprecationWarning,
             stacklevel=2,
         )
@@ -675,7 +675,7 @@ class HTTPResponse(io.IOBase):
     def getheader(self, name, default=None):
         warnings.warn(
             "HTTPResponse.getheader() is deprecated and will be removed "
-            "in urllib3 v2.1.0. Instead use HTTResponse.headers.get(name, default).",
+            "in urllib3 v2.1.0. Instead use HTTPResponse.headers.get(name, default).",
             category=DeprecationWarning,
             stacklevel=2,
         )
diff --git a/lib/urllib3/util/url.py b/lib/urllib3/util/url.py
index 94f1b8d4..3a169a43 100644
--- a/lib/urllib3/util/url.py
+++ b/lib/urllib3/util/url.py
@@ -63,7 +63,7 @@ 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")\]$")
 
-_HOST_PORT_PAT = ("^(%s|%s|%s)(?::0*([0-9]{0,5}))?$") % (
+_HOST_PORT_PAT = ("^(%s|%s|%s)(?::0*?(|0|[1-9][0-9]{0,4}))?$") % (
     REG_NAME_PAT,
     IPV4_PAT,
     IPV6_ADDRZ_PAT,