Drupal 10/11 Site Creation Failing

Summary

Drupal 10/11 Site Creation Failing

This incident has been resolved.

• Started

  May 27, 2026 · 9:22 AM

• Resolved

  May 27, 2026 · 2:59 PM

• Duration

  5h 37m

• Severity

  Major

• ◐

  Investigating

  May 27 · 9:22 AM Pantheon

  Site creation of Drupal 10 and 11 sites are failing due to a <a href="https://symfony.com/blog/cve-2026-46644-insecure-equivalence-in-symfony-polyfill-intl-idn-for-ascii-only-xn-labels">security vulnerability</a> recently disclosed in the "symfony/polyfill-intl-idn" library. We are working on a fix to re-enable site creation functionality.

• ◆

  Identified

  May 27 · 11:08 AM Pantheon

  The issue has been identified and a fix is being implemented.

• ◉

  Monitoring

  May 27 · 1:48 PM Pantheon

  A fix has been implemented and site creation should be working again. Please contact Support if you continue to have issues with new site creation.

• ✓

  Resolved

  May 27 · 2:59 PM Pantheon

  This incident has been resolved.