CVE-2026-53421

EUVD-2026-45958
Improper Isolation or Compartmentalization vulnerability in Apache Syncope.



An administrator with adequate entitlements can achieve remote code execution through the connector subsystem by relying on scripted connectors' (REST and SQL) capability to run Groovy scripts.

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 hardening the Groovy security sandbox.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 49.92%
Affected Products (NVD)
VendorProductVersion
apachesyncope
3.0.0 ≤
𝑥
≤ 3.0.16
apachesyncope
4.0.0 ≤
𝑥
< 4.0.7
apachesyncope
4.1.0 ≤
𝑥
< 4.1.2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://lists.apache.org/thread/nmzvz6gb2ldm30wvyk613r8dfrb6r8yx
http://www.openwall.com/lists/oss-security/2026/07/20/7