Severity: moderate Affected versions:
- Apache Syncope 3.0.0-M0 through 3.0.16 - Apache Syncope 4.0.0-M0 through 4.0.8 - Apache Syncope 4.1.0 through 4.1.3 Description: Improper isolation or compartmentalization vulnerability in Apache Syncope. An administrator with adequate entitlements can import arbitrary BPMN process definitions via the REST API and then start the process. When a BPMN process containing a JUEL expression is imported and started, the expression is executed directly on the server, with no sandbox. This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 through 4.0.8, from 4.1.0 through 4.1.3. Users are recommended to upgrade to version 4.0.9 / 4.1.4, which fix this issue by rejecting BPMN definitions including expression attributes. Credit: Josh Bressers (coordinator) Yll Berisha (finder) References: https://syncope.apache.org/ https://www.cve.org/CVERecord?id=CVE-2026-109083
