diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml
index 1b27d0a5479..5a3d6fdb5a3 100644
--- a/doc/src/sgml/protocol.sgml
+++ b/doc/src/sgml/protocol.sgml
@@ -1506,10 +1506,10 @@ SELCT 1/0;<!-- this typo is intentional -->
 
    <para>
     The frontend should also be prepared to handle an ErrorMessage
-    response to SSLRequest from the server.  This would only occur if
-    the server predates the addition of <acronym>SSL</acronym> support
-    to <productname>PostgreSQL</productname>.  (Such servers are now very ancient,
-    and likely do not exist in the wild anymore.)
+    response to SSLRequest from the server. The frontend should not display
+    this error message to the user/application, since the server has not been
+    authenticated
+    (<ulink url="https://www.postgresql.org/support/security/CVE-2024-10977/">CVE-2024-10977</ulink>).
     In this case the connection must
     be closed, but the frontend might choose to open a fresh connection
     and proceed without requesting <acronym>SSL</acronym>.
@@ -1619,12 +1619,13 @@ SELCT 1/0;<!-- this typo is intentional -->
 
    <para>
     The frontend should also be prepared to handle an ErrorMessage
-    response to GSSENCRequest from the server.  This would only occur if
-    the server predates the addition of <acronym>GSSAPI</acronym> encryption
-    support to <productname>PostgreSQL</productname>.  In this case the
-    connection must be closed, but the frontend might choose to open a fresh
-    connection and proceed without requesting <acronym>GSSAPI</acronym>
-    encryption.
+    response to GSSENCRequest from the server.  The frontend should not display
+    this error message to the user/application, since the server has not been
+    authenticated
+    (<ulink url="https://www.postgresql.org/support/security/CVE-2024-10977/">CVE-2024-10977</ulink>).
+    In this case the connection must be closed, but the frontend might choose
+    to open a fresh connection and proceed without requesting
+    <acronym>GSSAPI</acronym> encryption.
    </para>
 
    <para>
diff --git a/src/interfaces/libpq/fe-connect.c b/src/interfaces/libpq/fe-connect.c
index e69a5f5be3c..2f87961a71e 100644
--- a/src/interfaces/libpq/fe-connect.c
+++ b/src/interfaces/libpq/fe-connect.c
@@ -3512,22 +3512,12 @@ keep_going:						/* We will come back to here until there is
 					{
 						/*
 						 * Server failure of some sort, such as failure to
-						 * fork a backend process.  We need to process and
-						 * report the error message, which might be formatted
-						 * according to either protocol 2 or protocol 3.
-						 * Rather than duplicate the code for that, we flip
-						 * into AWAITING_RESPONSE state and let the code there
-						 * deal with it.  Note we have *not* consumed the "E"
-						 * byte here.
+						 * fork a backend process.  Don't bother retrieving
+						 * the error message; we should not trust it as the
+						 * server has not been authenticated yet.
 						 */
-						conn->status = CONNECTION_AWAITING_RESPONSE;
-
-						/*
-						 * Don't fall back to a plaintext connection after
-						 * reading the error.
-						 */
-						conn->failed_enc_methods |= conn->allowed_enc_methods & (~conn->current_enc_method);
-						goto keep_going;
+						libpq_append_conn_error(conn, "server sent an error response during SSL exchange");
+						goto error_return;
 					}
 					else
 					{
@@ -3611,13 +3601,9 @@ keep_going:						/* We will come back to here until there is
 					{
 						/*
 						 * Server failure of some sort, possibly protocol
-						 * version support failure.  We need to process and
-						 * report the error message, which might be formatted
-						 * according to either protocol 2 or protocol 3.
-						 * Rather than duplicate the code for that, we flip
-						 * into AWAITING_RESPONSE state and let the code there
-						 * deal with it.  Note we have *not* consumed the "E"
-						 * byte here.
+						 * version support failure.  Don't bother retrieving
+						 * the error message; we should not trust it anyway as
+						 * the server has not authenticated yet.
 						 *
 						 * Note that unlike on an error response to
 						 * SSLRequest, we allow falling back to SSL or
@@ -3626,8 +3612,8 @@ keep_going:						/* We will come back to here until there is
 						 * response might mean that we are connecting to a
 						 * pre-v12 server.
 						 */
-						conn->status = CONNECTION_AWAITING_RESPONSE;
-						goto keep_going;
+						libpq_append_conn_error(conn, "server sent an error response during GSS encryption exchange");
+						CONNECTION_FAILED();
 					}
 
 					/* mark byte consumed */