admin menu editor memory exhaustion

Hello.

Problem:

• When navigating to wp-admin => ultimate dashboard => admin menu editor, the page sends an ajax request to:

/wp-admin/admin-ajax.php?action=udb_admin_menu_get_users

• This call results in a PHP fatal error in our debug log:

[25-Feb-2026 17:04:31 UTC] PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 16777224 bytes) in /sites/WEBSITE/files/wp-includes/class-wpdb.php on line 2329

• The admin page itself loads, but the ajax request fails with HTTP 500, as you can see here:

ip address – standard [25/Feb/2026:11:04:31 -0600] “GET /wp-admin/admin-ajax.php?action=udb_admin_menu_get_users&nonce=9bcaeb2705&_=1772039066524 HTTP/2.0” 500 184 “https://WEBSITE/wp-admin/edit.php?post_type=udb_widgets&page=udb_admin_menu” “Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36”

Observations:

1. We do not have PRO.
2. This page loads.
3. I only noticed due to the fatal in our log, the page is not actively used by our team.
4. The issue appears to be from loading users for the admin menu editor.
5. Our site has about 14,000 users, with lots of custom meta data.
6. Other admin pages function normally with no errors.
7. The error is consistently reproducible on the one page.

Ideas:

1. If occurring from trying to load all users into memory, possibly pagination or limited field selection would help.

Environment:

• PHP 8.3
• WordPress v6.9.1
• Ultimate Dashboard v3.8.13

Thank you for your time.