CVE-2026-42797: Apache Syncope: JexlContextBuilder Information Disclosure
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Apache Syncopeto a version that resolves this vulnerability.Fixed in 4.0.6 - Upgrade
Upgrade
Apache Syncopeto a version that resolves this vulnerability.Fixed in 4.1.1
Event History
Frequently Asked Questions
What is the severity of CVE-2026-42797?
CVE-2026-42797 has a medium severity score of 4.9 according to the CVSS 3.1 metrics.
How does CVE-2026-42797 affect Apache Syncope?
CVE-2026-42797 exposes sensitive information through data queries, allowing unauthorized access to user-related security-sensitive information.
Who is affected by CVE-2026-42797?
Administrators with adequate entitlements for Derived Schemas and User read permissions are potentially affected by CVE-2026-42797.
How can I mitigate CVE-2026-42797?
To mitigate CVE-2026-42797, ensure that proper restrictions are in place on the creation and execution of JEXL expressions by administrators.
What version of Apache Syncope does CVE-2026-42797 apply to?
CVE-2026-42797 specifically applies to Apache Syncope.