CVE-2026-63071: Apache Syncope: RCE via Groovy Sandbox bypass

[Francesco Chicchiriccò <ilgrosso () apache org>]

Severity: moderate 

Affected versions:

- Apache Syncope (org.apache.syncope.core:syncope-core-spring) 3.0.0-M0 through 3.0.16
- Apache Syncope (org.apache.syncope.core:syncope-core-spring) 4.0.0-M0 through 4.0.6
- Apache Syncope (org.apache.syncope.core:syncope-core-spring) 4.1.0-M0 through 4.1.1

Description:

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.

Credit:

elin kai (finder)
无聊 (finder)

References:

https://syncope.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-63071