Apache Syncope: JexlContextBuilder Information Disclosure

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Summary

CVECVE-2026-42797
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-25 16:16:20 UTC
Updated2026-05-28 20:19:06 UTC
DescriptionExposure 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.

Risk And Classification

Primary CVSS: v3.1 4.9 MEDIUM from ADP

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.000610000 probability, percentile 0.192130000 (date 2026-06-01)

Problem Types: CWE-202 | CWE-202 CWE-202 Exposure of Sensitive Information Through Data Queries

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED4.9MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary4.9MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Apache Syncope All All All All
Application Apache Syncope 4.1.0 All All All
Application Apache Syncope All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache Syncope affected 3.0 3.0.16 semver Not specified
CNA Apache Software Foundation Apache Syncope affected 4.0 4.0.5 semver Not specified
CNA Apache Software Foundation Apache Syncope affected 4.1 4.1.0 semver Not specified

References

ReferenceSourceLinkTags
lists.apache.org/thread/5y7d277sntyytrmxnx2tfjr9ftcpq1s6 [email protected] lists.apache.org Mailing List, Vendor Advisory
www.openwall.com/lists/oss-security/2026/05/25/5 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: elin kai (en)

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