diff -ur a/db/drivers/mysql/db.c b/db/drivers/mysql/db.c
--- a/db/drivers/mysql/db.c	1969-12-31 19:00:01.000000000 -0500
+++ b/db/drivers/mysql/db.c	2023-11-09 23:26:25.329700495 -0500
@@ -52,9 +52,16 @@
 
         db_get_login2("mysql", name, &user, &password, &host, &port);
 
+        const char* errstr;
+        unsigned int port_number = (unsigned int)strtonum(port, 0, 65536, &errstr);
+        if (errstr != NULL) {
+            db_d_append_error("%s", errstr);
+            return DB_FAILED;
+        }
+
         connection = mysql_init(NULL);
         res = mysql_real_connect(connection, host, user, password,
-                                 connpar.dbname, port, NULL, 0);
+                                 connpar.dbname, port_number, NULL, 0);
 
         if (res == NULL) {
             db_d_append_error("%s\n%s", _("Connection failed."),