diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index cca9d19a..985fbc86 100644
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -5,6 +5,7 @@ Release Notes
 .. toctree::
    :maxdepth: 2
 
+   release-notes/version-5.0.1
    release-notes/version-5.0.0
 
    release-notes/version-4.9.4
diff --git a/docs/release-notes/version-5.0.1.rst b/docs/release-notes/version-5.0.1.rst
new file mode 100644
index 00000000..36fceeca
--- /dev/null
+++ b/docs/release-notes/version-5.0.1.rst
@@ -0,0 +1,14 @@
+=============
+Version 5.0.1
+=============
+
+Version 5.0.1 of mod_wsgi can be obtained from:
+
+  https://codeload.github.com/GrahamDumpleton/mod_wsgi/tar.gz/5.0.1
+
+Bugs Fixed
+----------
+
+* Fix issue which could result in process crashing when values were supplied
+  for user/password/realm of HTTP basic authentication which weren't compliant
+  with UTF-8 encoding format.
diff --git a/src/server/mod_wsgi.c b/src/server/mod_wsgi.c
index 671dc4ff..1c4d7b24 100644
--- a/src/server/mod_wsgi.c
+++ b/src/server/mod_wsgi.c
@@ -14885,14 +14885,27 @@ static authn_status wsgi_check_password(request_rec *r, const char *user,
             adapter = newAuthObject(r, config);
 
             if (adapter) {
+                PyObject *user_string = NULL;
+                PyObject *password_string = NULL;
+
+#if PY_MAJOR_VERSION >= 3
+                user_string = PyUnicode_DecodeLatin1(user, strlen(user), NULL);
+                password_string = PyUnicode_DecodeLatin1(password, strlen(password), NULL);
+#else
+                user_string = PyString_FromString(user);
+                password_string = PyString_FromString(password);
+#endif
+
                 vars = Auth_environ(adapter, group);
 
                 Py_INCREF(object);
-                args = Py_BuildValue("(Oss)", vars, user, password);
+                args = Py_BuildValue("(OOO)", vars, user_string, password_string);
                 result = PyObject_CallObject(object, args);
                 Py_DECREF(args);
                 Py_DECREF(object);
                 Py_DECREF(vars);
+                Py_DECREF(user_string);
+                Py_DECREF(password_string);
 
                 if (result) {
                     if (result == Py_None) {
@@ -15128,14 +15141,27 @@ static authn_status wsgi_get_realm_hash(request_rec *r, const char *user,
             adapter = newAuthObject(r, config);
 
             if (adapter) {
+                PyObject *user_string = NULL;
+                PyObject *realm_string = NULL;
+
+#if PY_MAJOR_VERSION >= 3
+                user_string = PyUnicode_DecodeLatin1(user, strlen(user), NULL);
+                realm_string = PyUnicode_DecodeLatin1(realm, strlen(realm), NULL);
+#else
+                user_string = PyString_FromString(user);
+                realm_string = PyString_FromString(realm);
+#endif
+
                 vars = Auth_environ(adapter, group);
 
                 Py_INCREF(object);
-                args = Py_BuildValue("(Oss)", vars, user, realm);
+                args = Py_BuildValue("(OOO)", vars, user_string, realm_string);
                 result = PyObject_CallObject(object, args);
                 Py_DECREF(args);
                 Py_DECREF(object);
                 Py_DECREF(vars);
+                Py_DECREF(user_string);
+                Py_DECREF(realm_string);
 
                 if (result) {
                     if (result == Py_None) {
@@ -15379,14 +15405,23 @@ static int wsgi_groups_for_user(request_rec *r, WSGIRequestConfig *config,
             adapter = newAuthObject(r, config);
 
             if (adapter) {
+                PyObject *user_string = NULL;
+
+#if PY_MAJOR_VERSION >= 3
+                user_string = PyUnicode_DecodeLatin1(r->user, strlen(r->user), NULL);
+#else
+                user_string = PyString_FromString(r->user);
+#endif
+
                 vars = Auth_environ(adapter, group);
 
                 Py_INCREF(object);
-                args = Py_BuildValue("(Os)", vars, r->user);
+                args = Py_BuildValue("(OO)", vars, user_string);
                 result = PyObject_CallObject(object, args);
                 Py_DECREF(args);
                 Py_DECREF(object);
                 Py_DECREF(vars);
+                Py_DECREF(user_string);
 
                 if (result) {
                     PyObject *iterator;
@@ -15930,14 +15965,27 @@ static int wsgi_hook_check_user_id(request_rec *r)
             adapter = newAuthObject(r, config);
 
             if (adapter) {
+                PyObject *user_string = NULL;
+                PyObject *password_string = NULL;
+
+#if PY_MAJOR_VERSION >= 3
+                user_string = PyUnicode_DecodeLatin1(r->user, strlen(r->user), NULL);
+                password_string = PyUnicode_DecodeLatin1(password, strlen(password), NULL);
+#else
+                user_string = PyString_FromString(r->user);
+                password_string = PyString_FromString(password);
+#endif
+
                 vars = Auth_environ(adapter, group);
 
                 Py_INCREF(object);
-                args = Py_BuildValue("(Oss)", vars, r->user, password);
+                args = Py_BuildValue("(OOO)", vars, user_string, password_string);
                 result = PyObject_CallObject(object, args);
                 Py_DECREF(args);
                 Py_DECREF(object);
                 Py_DECREF(vars);
+                Py_DECREF(user_string);
+                Py_DECREF(password_string);
 
                 if (result) {
                     if (result == Py_None) {