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

{
  "id": "711bd2da7f51c30f7d5d9e97ccb0235155c2bbe0eaf83b7a182a438237e5c516",
  "url": "https://www.drupal.org/sa-core-2026-012",
  "method": "llm",
  "payload": {
    "kind": "patch",
    "title": "Drupal core - Moderately critical - Cross-site scripting - SA-CORE-2026-012",
    "summary": "A cross-site scripting flaw in Layout Builder block labels is addressed by updates to supported Drupal core releases.",
    "evidence": "The Layout Builder module doesn't sufficiently sanitize block labels in certain scenarios, which can lead to a cross-site scripting (XSS) vulnerability.",
    "products": [
      {
        "name": {
          "value": "Drupal core",
          "evidence": "Project: Drupal core"
        },
        "prerequisites": [
          {
            "value": "both the attacker and the targeted user need to be using the Layout Builder editing interface",
            "evidence": "This is mitigated by the fact that both the attacker and the targeted user need to be using the Layout Builder editing interface."
          }
        ],
        "fixed_versions": [
          {
            "value": "11.4.4",
            "evidence": "If you use Drupal 11.4.x, update to Drupal 11.4.4."
          },
          {
            "value": "11.3.14",
            "evidence": "If you use Drupal 11.3.x, update to Drupal 11.3.14."
          },
          {
            "value": "10.6.13",
            "evidence": "If you use Drupal 10.6.x, update to Drupal 10.6.13."
          }
        ],
        "affected_versions": [
          {
            "value": "<10.6.13 || >=11.3.0 <11.3.14 || >=11.4.0 <11.4.4 || 11.0.* || 11.1.* || 11.2.*",
            "evidence": "Affected versions: <10.6.13 || >=11.3.0 <11.3.14 || >=11.4.0 <11.4.4 || 11.0.* || 11.1.* || 11.2.*"
          }
        ]
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-55805",
        "evidence": "CVE IDs: CVE-2026-55805"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-drupal-security",
  "document_id": 23458,
  "published_at": "2026-07-15T19:52:26+00:00"
}