05/20/2026
Drupal published a critical security update for core today. A few things make this one stand out:
1. "Core" means Drupal itself — not a module. Every Drupal site is affected.
2. Drupal backported the patch to Drupal 8 and Drupal 9, even though both have been end-of-life for years. They effectively never do this. That's how high-risk this advisory is.
3. Fixed versions are published for every branch from Drupal 8 through Drupal 11: 8.9.21, 9.5.12, 10.5.10, 10.6.9, 11.2.12, 11.3.10.
What to do:
→ If your site is on our maintenance plan, no action needed on your end. We're already scheduling the deployment with proper testing and rollback in place.
→ If you don't have ongoing maintenance, please reach out today — critical-severity patches close exploit windows that open within days of release.
Even if your site is on a Drupal version you thought was unsupported, a patch exists for it. Don't ignore this one.