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

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-20 · updated 2026-10-24
Weakness: CWE-653

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.

Affected products

Apache Software Foundation Apache Syncope: from 3.0.0 through 3.0.16; from 4.0.0 before 4.0.7; from 4.1.0 before 4.1.2 — fixed in 4.0.7, 4.1.2

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Syncope 4.0.7, 4.1.2. Check the vendor advisory for mitigations.

References

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