CVE-2026-63071: Apache Syncope

Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days.

Improper Isolation or Compartmentalization vulnerability in Apache Syncope. An administrator with adequate entitlements for Implementations can create a malicious Groovy class containing untrusted code bypassing the Groovy security sandbox. This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 through 4.0.6, from 4.1.0-M0 through 4.1.1. Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue by tightening the Groovy security sandbox.

Affected products

• Apache Syncope: from 3.0.0, up to and including 3.0.16; from 4.0.0, before 4.0.7 (fixed in 4.0.7); from 4.1.0, before 4.1.2 (fixed in 4.1.2)

Published 2026-07-20. Last modified 2026-07-27.