Improper Isolation Vulnerability in Apache Syncope by Apache
CVE-2026-53405

9.8CRITICAL

Key Information:

Vendor

Apache
Status
Apache Syncope
Vendor
CVE Published:
20 July 2026

What is CVE-2026-53405?

An improper isolation vulnerability in Apache Syncope allows administrators with the right entitlements to import and start arbitrary BPMN process definitions through the REST API. This vulnerability can enable an unauthorized execution of Groovy scripts on the server, as there is no security sandboxing in place. The issue affects multiple versions, and it is imperative for users to upgrade to versions 4.0.7 or 4.1.2 to mitigate the risk by implementing security measures that restrict Groovy script execution.

Affected Version(s)

Apache Syncope 3.0.0-M0 <= 3.0.16

Apache Syncope 4.0.0-M0 <= 4.0.6

Apache Syncope 4.1.0-M0 <= 4.1.1

References

https://lists.apache.org/thread/vdq0tk6ylffz6trbgbllj9kb1...
vendor-advisory

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

follycat, Y0n3er
.