CVE-2026-42782

Modified Modified - Updated After Analysis

Improper Isolation in Apache Syncope via Groovy Execution

Publication date: 2026-05-25

Last updated on: 2026-05-27

Assigner: Apache Software Foundation

Description

Improper Isolation or Compartmentalization vulnerability in Apache Syncope. An administrator with adequate entitlements for Implementations can create a malicious Groovy class containing untrusted code reaching a non-sandboxed execution path via the class static initializer. This issue affects Apache Syncope: 3.0 through 3.0.16, 4.0 through 4.0.5, 4.1.0. Users are recommended to upgrade to version 4.0.6 / 4.1.1, which fix this issue by forcing even the static initializer in Groovy code to run in a sandbox.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-05-25

Last Modified

2026-05-27

Generated

2026-07-06

AI Q&A

2026-05-26

EPSS Evaluated

2026-07-04

NVD

CVE-2026-42782

EUVD

EUVD-2026-31696

Affected Vendors & Products

Vendor	Product	Version / Range
apache	syncope	From 3.0.0 (inc) to 3.0.16 (inc)
apache	syncope	From 4.0.0 (inc) to 4.0.6 (exc)
apache	syncope	4.1.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-653	The product does not properly compartmentalize or isolate functionality, processes, or resources that require different privilege levels, rights, or permissions.

Attack-Flow Graph

Executive Summary

This vulnerability is an Improper Isolation or Compartmentalization issue in Apache Syncope. It allows an administrator with sufficient permissions related to Implementations to create a malicious Groovy class that contains untrusted code. This code can execute through the class static initializer without being sandboxed, meaning it can run with fewer restrictions than intended.

Impact Analysis

The impact of this vulnerability is that malicious code can be executed within Apache Syncope by an authorized administrator, potentially leading to unauthorized actions or compromise of the system. Since the Groovy code runs outside of a sandbox, it may perform harmful operations that could affect the integrity, confidentiality, or availability of the system.

Mitigation Strategies

To mitigate this vulnerability, users are recommended to upgrade Apache Syncope to version 4.0.6 or 4.1.1.

These versions fix the issue by forcing even the static initializer in Groovy code to run in a sandbox, preventing untrusted code execution.

Hi! I’m here to help you understand CVE-2026-42782. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70