Drupal core - Moderately critical - Cross-site scripting - SA-CORE-2026-012

Project: Drupal core Project machine name: drupal Date: 2026-July-15 Security risk: Moderately critical 13 ∕ 25 AC:Basic/A:User/CI:Some/II:Some/E:Theoretical/TD:Default Vulnerability: Cross-site scripting Affected versions: <10.6.13 || >=11.3.0 <11.3.14 || >=11.4.0 <11.4.4 || 11.0.* || 11.1.* || 11.2.* CVE IDs: CVE-2026-55805 Description: The Layout Builder module doesn't sufficiently sanitize block labels in certain scenarios, which can lead to a cross-site scripting (XSS) vulnerability. This is mitigated by the fact that both the attacker and the targeted user need to be using the Layout Bu…

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