- Drupal will release a critical security fix for its CMS on May 20, 2026, warning that exploits could appear “within hours or days.”
- Patches will be issued for supported versions 11.3.x, 11.2.x, 10.6.x, and 10.5.x, with best-effort files for outdated Drupal 8 and 9 sites.
- Administrators are urged to update to the latest patch for their version now and reserve time during the release window to apply the emergency update.
- The vulnerability is severe enough that Drupal is providing patches for end-of-life minor versions, but Drupal 7 is not affected.
The maintainers of the PHP-based content management system Drupal have issued an urgent alert for a “core security release” scheduled for May 20, 2026, according to their official release schedule. The Drupal Security Team explicitly warned that “exploits might be developed within hours or days” of the patch’s publication.
Consequently, all site administrators must reserve time between 5-9 p.m. UTC that day to determine if their configuration is affected. However, not all configurations will require the immediate update, though mitigation details will be included in the advisory.
The security patches will specifically cover the supported branches of Drupal core: 11.3.x, 11.2.x, 10.6.x, and 10.5.x. Therefore, Drupal advises sites on these versions to update to the latest patch release for their branch immediately in preparation.
Meanwhile, sites on older, end-of-life minor versions like Drupal 11.1 or 10.4 must update to at least 11.1.9 or 10.4.9, respectively. These sites should then apply the May 20 security fix before planning an upgrade to a fully supported version.
For sites still on major versions Drupal 8 and 9, manual patch files for versions 8.9 and 9.5 will be provided. The maintainers caution there is no guarantee these fixes will work correctly and may cause other issues.
Drupal strongly recommends that Drupal 8 or 9 sites upgrade to at least Drupal 10.6 soon. The organization also confirmed that Drupal 7 is not affected by this newly disclosed vulnerability.
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