Pantheon release notes

The latest version of WordPress, 6.9.1, is available on Pantheon as of February 4, 2026.

Action required

Upgrade to WordPress 6.9.1 right from your Pantheon dashboard or Terminus to access the latest features, fixes, and security enhancements. See related documentation for how to apply core updates.

Highlights

• This minor release includes fixes for 49 bugs throughout Core and the Block Editor, addressing issues affecting multiple areas of WordPress including the block editor, mail, and classic themes. For a full list of bug fixes, please refer to the release candidate announcement.

WordPress 6.9.1 is a short-cycle maintenance release. The next major version of WordPress will be 7.0; it is scheduled for release on 9 April 2026 at WordCamp Asia.

For full details about WordPress 6.9.1, see the official release announcement.

We are pleased to announce that all of our actively maintained WordPress plugins are now confirmed fully compatible with WordPress 6.9.

Actively Maintained Plugins

The following plugins have been tested and verified for compatibility:

• WP SAML Auth
• Pantheon Advanced Page Cache
• Pantheon HUD
• Native PHP Sessions
• Pantheon Content Publisher
• WP Redis

Action Required

We recommend updating your Pantheon plugins to their latest versions alongside your WordPress 6.9 core upgrade. This ensures you receive the latest performance optimizations, security patches, and full compatibility with PHP 8.4.

As a best practice, always test these updates in a Dev or Multidev environment before deploying to Live.

Pantheon has released a new version of our WP SAML Auth WordPress plugin. This update focuses on modernizing PHP support and providing developers with more granular control over SAML configurations.

What's New

• PHP 8.4 Compatibility: Full support for PHP 8.4 has been added.
• Updated PHP Requirements: The minimum supported PHP version has been increased to 7.4 to ensure better security and performance.
• WordPress 6.9 Compatibility: Confirmed compatibility with WordPress 6.9.
• Enhanced Configuration: Added the wp_saml_auth_internal_config filter, allowing developers to customize the OneLogin SAML configuration.
• SimpleSAMLphp 2.x Support: Improved auto-detection for SimpleSAMLphp 2.x and optimized autoloader discovery to skip redundant processes when the SimpleSAML\Auth\Simple class is already loaded.

Bug Fixes

Settings Page Warnings: Fixed a warning message on the plugin's settings page that appeared for users not utilizing SimpleSAML.

Important: Compatibility & Testing

While this update improves autoloader discovery, it changes how the plugin interacts with the local environment. We strongly recommend testing in a lower environment before upgrading especially if you use:

• Non-Standard Installations: Custom SimpleSAMLphp installations located in non-standard directories.
• Manual Autoloaders: Custom autoloader code that manually handles the loading of SimpleSAMLphp.

Action required

We encourage you to upgrade to the latest version of WP SAML Auth as soon as possible to take advantage of the latest features and compatibility updates. updating to get the latest features and compatibility updates.

If you have questions or concerns, please open issues in the queue for the plugin.

The latest version of WordPress, 6.9, is available on Pantheon as of December 02, 2025.

Action required

Upgrade to WordPress 6.9 right from your Pantheon dashboard or Terminus to access the latest features, fixes, and security enhancements. See related documentation for how to apply core updates.

For full details about WordPress 6.9, see the release notes

The Pantheon Content Publisher plugin is now officially available in the WordPress Plugin Repository. You can now install or update it directly from your WordPress dashboard.

Action required

We recommend that all customers switch their sites to the WordPress.org–hosted version to take advantage of seamless updates and improved long-term support. By switching, you’ll:

• Receive automatic update notifications and one-click upgrades within the WordPress admin panel
• Stay up to date with the latest security, stability, and compatibility improvements
• Benefit from WordPress’s official distribution system, including built-in changelogs, and version tracking

Switching to the repository version helps ensure your site runs the most stable and officially supported release of the plugin.

For sites using Object Cache Pro, a new recommended config constant, Pantheon OCP Config Version 2.0, is now available.

The primary change is setting the analytics persist setting to false to reduce Redis errors experienced by sites. This will now clear object caching analytics when the cache is flushed.

View the new config constant here.

Action Required

You may choose to manually replace the WP_REDIS_CONFIG constant in your wp-config-ocp.php or re-run terminus install:run <site>.<environment> ocp to apply the changes.

The latest version of WordPress, 6.8.3, is available on Pantheon as of September 30, 2025.

Action required

Upgrade to WordPress 6.8.3 right from your Pantheon dashboard or Terminus to access the latest features, fixes, and security enhancements. See related documentation for how to apply core updates.

Highlights

• This is a security release - immediately update your websites
• Resolved security issues include a data exposure risk for authenticated users and an authenticated user role XSS vulnerability in navigation menus

For full details about WordPress 6.8.3, see the official release announcement.

Pantheon has released a new version of our Native PHP Sessions plugin. This release updates documentation and a number of minor dependencies under the hood. Most notably, this update tests the plugin against PHP 8.4, increases the minimum PHP version to 7.4 and bumps the minimum supported WordPress version to 5.3. Additionally, to comply with WordPress plugin repository guidelines, we have removed "WordPress" from the plugin name.

Action required

You are encouraged to upgrade your version of Native PHP Sessions to the latest version as soon as you are able.

If you have issues with the plugin, please use the GitHub issue queue for the plugin.