CVE-2026-23795: Apache Syncope Console XXE On Keymaster Parameters Vulnerability
MODERATECVE-2026-23795 is a MODERATE (CVSS 4.9) console xxe on keymaster parameters vulnerability (CWE-611: Improper Restriction of XML External Entity Reference) affecting Apache Syncope libraries in the Maven ecosystem. The issue involves console xxe on keymaster parameters. Remediation is available by upgrading affected packages to version 3.0.16, 4.0.4.
CVE-2026-23795 at a Glance
Security Impact
CVSS: 4.9
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N).
How to Fix CVE-2026-23795
To remediate this vulnerability, upgrade all affected Apache Syncope dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>org.apache.syncope.client.idrepo</groupId>
<artifactId>syncope-client-idrepo-console</artifactId>
<version>3.0.16</version>
</dependency><dependency>
<groupId>org.apache.syncope.client.idrepo</groupId>
<artifactId>syncope-client-idrepo-console</artifactId>
<version>4.0.4</version>
</dependency>Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:tree -Dincludes=org.apache.syncope.client.idrepoHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2026-23795, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=org.apache.syncope.client.idrepoAnalyze the terminal output to locate any version of Apache Syncope in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.0.16), your application is affected.
Note: The mvn dependency:tree -Dincludes=org.apache.syncope.client.idrepo command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-611: Improper Restriction of XML External Entity Reference, where the product processes an xml document that can contain xml entities with uris that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. In Apache Syncope, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-23795 Affected Apache Syncope Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
org.apache.syncope.client.idrepo:syncope-client-idrepo-console
|
Maven |
≥ 3.0.0
< 3.0.16
|
3.0.16
|
|
org.apache.syncope.client.idrepo:syncope-client-idrepo-console
|
Maven |
≥ 4.0.0
< 4.0.4
|
4.0.4
|
References
Frequently Asked Questions
What is CVE-2026-23795?
Which Apache Syncope versions are affected?
What version fixes CVE-2026-23795?
Is syncope-client-idrepo-console affected?
What is the CVSS score of CVE-2026-23795?
What CWE is associated with CVE-2026-23795?
How can I check Maven dependencies for CVE-2026-23795?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-73f3-rqqf-2j54",
"modified" : "2026-02-03T19:53:38Z",
"published" : "2026-02-03T18:30:44Z",
"aliases" : [ "CVE-2026-23795" ],
"summary" : "Apache Syncope: Console XXE on Keymaster parameters",
"details" : "Improper Restriction of XML External Entity Reference vulnerability in Apache Syncope Console. An administrator with adequate entitlements to create or edit Keymaster parameters via Console can construct malicious XML text to launch an XXE attack, thereby causing sensitive data leakage occurs.\n\nThis issue affects Apache Syncope: from 3.0 through 3.0.15, from 4.0 through 4.0.3.\n\nUsers are recommended to upgrade to version 3.0.16 / 4.0.4, which fix this issue.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "org.apache.syncope.client.idrepo:syncope-client-idrepo-console"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "3.0.0"
}, {
"fixed" : "3.0.16"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Maven",
"name" : "org.apache.syncope.client.idrepo:syncope-client-idrepo-console"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "4.0.0"
}, {
"fixed" : "4.0.4"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-23795"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/apache/syncope"
}, {
"type" : "WEB",
"url" : "https://lists.apache.org/thread/mzgbdn8hzk8vr94o660njcc7w62c2pos"
}, {
"type" : "WEB",
"url" : "http://www.openwall.com/lists/oss-security/2026/02/02/2"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-611" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2026-02-03T19:53:38Z",
"nvd_published_at" : "2026-02-03T16:16:13Z"
}
}