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

Severity: medium (CVSS 4.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-03 · updated 2026-06-17
Weakness: CWE-611

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.

Affected products

Apache Software Foundation Apache Syncope: from 3.0.0 before 3.0.16; from 4.0.0 before 4.0.4 — fixed in 3.0.16, 4.0.4

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Syncope 3.0.16, 4.0.4. Check the vendor advisory for mitigations.

References

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