Apache Syncope up to 3.0.16/4.0.5/4.1.0 Groovy Code improper isolation or compartmentalization

Summaryinfo

A vulnerability was found in Apache Syncope up to 3.0.16/4.0.5/4.1.0. It has been declared as problematic. This affects an unknown part of the component Groovy Code Handler. The manipulation results in improper isolation or compartmentalization. This vulnerability is reported as CVE-2026-42782. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apache Syncope up to 3.0.16/4.0.5/4.1.0. It has been classified as problematic. Affected is some unknown processing of the component Groovy Code Handler. The manipulation with an unknown input leads to a improper isolation or compartmentalization vulnerability. CWE is classifying the issue as CWE-653. The product does not properly compartmentalize or isolate functionality, processes, or resources that require different privilege levels, rights, or permissions. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was disclosed by Trung Nguyen. The advisory is shared for download at lists.apache.org. This vulnerability is traded as CVE-2026-42782 since 04/29/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Additional levels of successful authentication are required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/25/2026).

Upgrading to version 4.0.6 or 4.1.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-31696). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Apache

Name

• Syncope

Version

• 3.0.0
• 3.0.1
• 3.0.2
• 3.0.3
• 3.0.4
• 3.0.5
• 3.0.6
• 3.0.7
• 3.0.8
• 3.0.9
• 3.0.10
• 3.0.11
• 3.0.12
• 3.0.13
• 3.0.14
• 3.0.15
• 3.0.16
• 4.0
• 4.0.0
• 4.0.1
• 4.0.2
• 4.0.3
• 4.0.4
• 4.0.5
• 4.1.0

License

• open-source

Website

• Vendor: https://www.apache.org/

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Once again VulDB remains the best source for vulnerability data.

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