Drupal core - Moderately critical - Gadget chain - SA-CORE-2026-006

Project: Drupal core Project machine name: drupal Date: 2026-June-17 Security risk: Moderately critical 14 ∕ 25 AC:Complex/A:Admin/CI:All/II:All/E:Theoretical/TD:Uncommon Vulnerability: Gadget chain Affected versions: <10.5.12 || >=10.6.0 <10.6.11 || >=11.2.0 <11.2.14 || >=11.3.0 <11.3.12 || 11.0.* || 11.1.* CVE IDs: CVE-2026-55804 Description: Drupal core contains a chain of methods that could be exploitable when an insecure deserialization vulnerability exists on the site. This so-called "gadget chain" presents no direct threat, but is a vector that can be used to achieve remote code execut…

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