SecFeed is an RSS or JSON feed that will read the CVE releases and list the most recent issues based on a given list of keywords.
Note that this tool is very loose and does not try to filter a maximum of results, at the contrary, it tries to be light on filtering to give the opportunity to a human (you) to judge if an action has to be taken or not for each item. Therefore you will receive more notifications than there are actions to be taken.
Check in the index.php file, there are some parameters hard coded in there.
$keywords = array('drupal', 'wordpress', 'apache', 'php', 'mysql', 'mariadb');
Update this list with the keywords of the tech you are looking for.
You simply host the site and load the page with two parameters and then subscribe to it in your RSS reader of choice!
JSON Format, updated every 4 hours
http://local.securityfeed.com/?format=json&lifetime=4
RSS Format, updated every 3 hours
http://local.securityfeed.com/?format=rss&lifetime=3
You can use your RSS reader app of choice like Reeder or even an IFTTT recipe like RSS to Email to receive email notifications once something comes up.