Improper access control in Apache Syncope - CVE-2026-42797
Published: August 25, 2026
Vulnerability identifier: #VU145288
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-42797
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in JexlContextBuilder when evaluating a crafted JEXL expression for derived schemas. A remote user can create a malicious JEXL expression to disclose sensitive information.
Exploitation requires administrative access with adequate entitlements for Derived Schemas, and the exposed data is limited to user-related security-sensitive information accessible by an administrator with sufficient entitlements for User read.
Affected software
Apache Syncope
How to mitigate CVE-2026-42797
Install security update from vendor's website.
Apache Syncope - update to 4.0.6