View online: https://www.drupal.org/sa-contrib-2026-275 Project: Single Content Sync [1] Project machine name: single_content_sync Date: 2026-October-28 Security risk: *Critical* 17 ∕ 25 AC:Basic/A:Admin/CI:All/II:All/E:Theoretical/TD:All [2] Vulnerability: Remote code execution Affected versions: <1.4.19 CVE IDs: CVE-2026-118562 Description: Single Content Sync enables exporting and importing content, referenced entities, and files between Drupal sites. A maliciously crafted import file can cause untrusted data to be deserialized, potentially leading to remote code execution. This vulnerability is mitigated by the fact that an attacker must have a role with the "import single content" permission. Solution: Install the latest version: * Upgrade to Single Content Sync 1.4.19 [3]. Reported By: * Drew Webber (mcdruid) [4] of the Drupal Security Team Fixed By: * Drew Webber (mcdruid) [5] of the Drupal Security Team * Oleksandr Kuzava (nginex) [6] Coordinated By: * Swan Kalata (akalata) [7] of the Drupal Security Team * Greg Knaddison (greggles) [8] of the Drupal Security Team * Lee Rowlands (larowlan) [9] of the Drupal Security Team * Drew Webber (mcdruid) [10] of the Drupal Security Team * Juraj Nemec (poker10) [11] of the Drupal Security Team * Jess (xjm) [12] of the Drupal Security Team ------------------------------------------------------------------------------ Contribution record [13] [1] https://www.drupal.org/project/single_content_sync [2] https://www.drupal.org/drupal-security-team/security-risk-levels-defined [3] https://www.drupal.org/project/single_content_sync/releases/1.4.19 [4] https://www.drupal.org/u/mcdruid [5] https://www.drupal.org/u/mcdruid [6] https://www.drupal.org/u/nginex [7] https://www.drupal.org/u/akalata [8] https://www.drupal.org/u/greggles [9] https://www.drupal.org/u/larowlan [10] https://www.drupal.org/u/mcdruid [11] https://www.drupal.org/u/poker10 [12] https://www.drupal.org/u/xjm [13] https://new.drupal.org/contribution-record?source_link=https%3A//www.drupal....