CVE-2026-42797
Analyzed Analyzed - Analysis Complete
Exposure of Sensitive Information in Apache Syncope via Malicious JEXL

Publication date: 2026-05-25

Last updated on: 2026-05-28

Assigner: Apache Software Foundation

Description
Exposure of Sensitive Information Through Data Queries vulnerability in Apache Syncope. An administrator with adequate entitlements for Derived Schemas can create a malicious JEXL expression which allows any administrator with sufficient entitlements for User read to access User-related security-sensitive information. 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 further restricting the JEXL expression definition.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-05-25
Last Modified
2026-05-28
Generated
2026-06-15
AI Q&A
2026-05-26
EPSS Evaluated
2026-06-14
NVD
CVE-2026-42797
EUVD
EUVD-2026-31702
Affected Vendors & Products
Showing 3 associated CPEs
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
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-202 When trying to keep information confidential, an attacker can often infer some of the information by using statistics.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Mitigation Strategies

To mitigate this vulnerability, users are recommended to upgrade Apache Syncope to version 4.0.6 or 4.1.1, which fix the issue by further restricting the JEXL expression definition.

Executive Summary

This vulnerability in Apache Syncope allows an administrator with the right permissions for Derived Schemas to create a malicious JEXL expression.

This malicious expression enables any administrator who has sufficient permissions to read User data to access security-sensitive information related to users that they normally should not be able to see.

Impact Analysis

The vulnerability can lead to unauthorized exposure of sensitive user information to administrators who should not have access to such data.

This could result in data breaches, privacy violations, and potential misuse of sensitive user information within the affected Apache Syncope versions.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-42797. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart