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Drupal Security retweeted
The PHP security team is giving advance notice: Upcoming security release Wed, Oct 21st 2026, 14:00UTC, two critical vulnerabilities, both rated CVSSv4 9.2. PHP users are encouraged to prepare to update. Earlier release if details become public or active exploit evidence.
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The Drupal Security Team estimates that up to 5% of Drupal sites may be vulnerable to this highly critical issue. Furthermore, a majority of Drupal sites may also be affected by the Symfony and Twig security advisories published today, so all sites should update soon.
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Drupal-related security releases today include those referenced below. You can start updating dependencies from Symfony and doing testing steps now.
During the last few weeks, the #Symfony core team has been hard at work fixing a long list of vulnerabilities for both #Symfony and #Twig. Today, we're publishing that work in the biggest security patch releases ever. Bare with us and wish us luck 🍀
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Site owners are encouraged to get their sites ready for a release of Drupal core that may affect them. Site owners should make upgrades easier (e.g. update to the most recent release, improve deployment automation, improve automated testing) given the current security climate.
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New Drupal core releases address XSS, access bypass, and a gadget chain hardening. The XSS issue is protected by the Drupal Steward service. Details on all 3 issues available at drupal.org/sa-core-2025-001 drupal.org/sa-core-2025-002 drupal.org/sa-core-2025-003
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Drupal core - Moderately critical - Improper error handling - SA-CORE-2024-002 drupal.org/sa-core-2024-002 Only Drupal 10.0 through 10.2 are affected.
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