Improper Isolation Vulnerability in Apache Syncope
CVE-2026-53421

9.8CRITICAL

Key Information:

Vendor

Apache
Status
Apache Syncope
Vendor
CVE Published:
20 July 2026

What is CVE-2026-53421?

An improper isolation vulnerability exists in Apache Syncope, allowing administrators with sufficient entitlements to execute remote code via scripted connectors. This risk is particularly associated with the ability of REST and SQL connectors to run Groovy scripts. Versions 3.0.0-M0 through 3.0.16 and 4.0.0-M0 through 4.0.6 are affected, highlighting the need for immediate upgrades to versions 4.0.7 and 4.1.2, which enhance Groovy security sandboxing.

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/nmzvz6gb2ldm30wvyk613r8df...
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
.