WordPress 7.1.1 RC1 Targets Bugs Before 17 September Release

Laptop used to test WordPress 7.1.1 RC1 before release

WordPress 7.1.1 RC1 is now available for testing ahead of the planned final release on 17 September 2026.

Quick takeaway
Do not install RC1 on a live business website.

Treat it as a testing build. Use staging if you want to check compatibility before the final release.

The release candidate is a bug-fix maintenance build rather than a feature release. WordPress says it targets regressions introduced during the 7.1 cycle and issues that were deliberately deferred at the end of that release.

⚠️

Fatal-error fix

A hook callback change can cause fatal errors where code expects string keys.

👥

Multisite fix

A regression affecting content reassignment when deleting a user is included.

📱

Mobile admin fix

The build also addresses a mobile admin layout problem during plugin updates.

The official WordPress 7.1.1 RC1 announcement also lists editor, media and gallery fixes.

Release path
Now

RC1 testing

Staging only
15 September

Bug scrub

Final checks
17 September

7.1.1 planned

Final release

For businesses running plugin-heavy WordPress sites, bespoke integrations or important ecommerce and lead-generation journeys, the real question is not whether RC1 installs successfully. It is whether the functions customers actually use still work afterwards.

✉️

FormsSend a real test enquiry

📱

Mobile layoutsCheck page-builder views

🔐

LoginsTest account access

🛒

CheckoutRun the full payment journey

Our guide on how often to update WordPress explains why routine maintenance, security fixes and higher-risk releases should not all be treated the same way.

WordPress has scheduled the general release of 7.1.1 for Thursday 17 September at 15:00 UTC, although timings can change if testing uncovers further issues. The published 7.1.1 release schedule includes another bug scrub on 15 September before the final build.

The simple rule
Staging first. Live site later.

Wait for the final build before considering a live rollout, then verify the journeys that generate enquiries, bookings or sales.

What UK businesses should do now

✓ Leave live sites on the current stable WordPress version✓ Use a recoverable backup before any testing✓ Test RC1 only on staging or a disposable environment✓ Recheck forms, layouts, logins, uploads and checkout

If you manage updates in-house, document what changed and keep a current recoverable backup. For businesses that prefer controlled deployment, backups and ongoing checks, Core Web UK’s website maintenance service covers WordPress, Elementor and WooCommerce sites.