CVE-2026-53405

criticalCVSS 9.8covered by 1 sourcefirst seen 2026-07-20

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 Groovy scriptTask is imported and started, the Groovy script 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 4.0.6, 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 wrapping Flowable's Groovy scriptTasks with security sandbox.

⚡ Watch CVE-2026-53405

Get an email if CVE-2026-53405 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.

Exploitation outlook

Low exploitation risk0.45% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalCVE-2026-53405: Improper Isolation or Compartmentalization vulnerability in Apache Syncope. An administrator w…nvd · 2026-07-20

External references

NVD record for CVE-2026-53405

CVE.org record

Embed the live status

— this badge updates automatically when the KEV or exploit status changes. How to embed it →

[![CVE-2026-53405 status](https://www.csirts.com/badge/CVE-2026-53405)](https://www.csirts.com/cve/CVE-2026-53405)