DRUPAL-CONTRIB-2026-192
The advisory, in context
The Block AJAX module enables you to load blocks asynchronously via Ajax.
The module doesn't sufficiently validate user-supplied data which is used to construct a block. In the worst case scenario, this can lead to PHP Object Injection and Remote Code Execution.
The vulnerability is mitigated by the fact that it only affects sites that have Layout Builder enabled (or another block plugin that handles the data this module passes to it in a potentially unsafe way).
Please see the release notes for details of potentially breaking changes.
Affected packages
Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.
Earlier releases before 3.0.2
Fixed in 3.0.2
View affected-version evidence
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