CVE-2026-23795 Apache Syncope: Console XXE on Keymaster parameters

What is CVE-2026-23795?

CVE-2026-23795 is a medium-severity vulnerability in Apache Syncope, published on 3 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

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.

This issue affects Apache Syncope: from 3.0 through 3.0.15, from 4.0 through 4.0.3.

Users are recommended to upgrade to version 3.0.16 / 4.0.4, which fix this issue.

Weakness: CWE-611

Which versions are affected by CVE-2026-23795?

4 open source packages ship an affected version, including org.apache.syncope.client.idrepo:syncope-client-idrepo-console. It affects 1 product.

Products include Apache Syncope.

How do I fix CVE-2026-23795?

Upgrade org.apache.syncope.client.idrepo:syncope-client-idrepo-console to a fixed version for your release line: 3.0.16 or 4.0.4.

Is CVE-2026-23795 being exploited?

There is no known exploitation of CVE-2026-23795 in the wild and no public exploit code.

Other vulnerabilities in Apache Syncope

• CVE-2026-53405 Apache Syncope: Remote Code Execution via Flowable BPMN Groovy ScriptTask Critical 9.8
• CVE-2026-53421 Apache Syncope: Remote Code Execution via Scripted Connector Critical 9.8
• CVE-2026-57308 Apache Syncope: SQL injection vulnerability in Audit Events search Critical 9.8
• CVE-2026-62183 Apache Syncope: User self-service privilege escalation Critical 9.8
• CVE-2026-63071 Apache Syncope: RCE via Groovy Sandbox bypass Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-73f3-rqqf-2j54.