--- a/src/java.base/share/classes/sun/net/www/protocol/http/HttpURLConnection.java	Thu Aug 22 13:47:14 2019 +0200
+++ b/src/java.base/share/classes/sun/net/www/protocol/http/HttpURLConnection.java	Thu Aug 22 14:36:10 2019 +0100
@@ -2265,6 +2265,8 @@
         if (host != null && authhdr.isPresent()) {
             HeaderParser p = authhdr.headerParser();
             String realm = p.findValue("realm");
+            String charset = p.findValue("charset");
+            boolean isUTF8 = (charset != null && charset.equalsIgnoreCase("UTF-8"));
             String scheme = authhdr.scheme();
             AuthScheme authScheme = UNKNOWN;
             if ("basic".equalsIgnoreCase(scheme)) {
@@ -2310,7 +2312,7 @@
                                     realm, scheme, url, RequestorType.PROXY);
                     if (a != null) {
                         ret = new BasicAuthentication(true, host, port, realm, a,
-                                             getAuthenticatorKey());
+                                             isUTF8, getAuthenticatorKey());
                     }
                     break;
                 case DIGEST:
@@ -2428,6 +2430,8 @@
             HeaderParser p = authhdr.headerParser();
             String realm = p.findValue("realm");
             String scheme = authhdr.scheme();
+            String charset = p.findValue("charset");
+            boolean isUTF8 = (charset != null && charset.equalsIgnoreCase("UTF-8"));
             AuthScheme authScheme = UNKNOWN;
             if ("basic".equalsIgnoreCase(scheme)) {
                 authScheme = BASIC;
@@ -2479,7 +2483,7 @@
                             realm, scheme, url, RequestorType.SERVER);
                     if (a != null) {
                         ret = new BasicAuthentication(false, url, realm, a,
-                                    getAuthenticatorKey());
+                                    isUTF8, getAuthenticatorKey());
                     }
                     break;
                 case DIGEST: