CVE-2026-73236

EUVD-2026-77474

14.09.2026, 14:17

Incorrect Authorization vulnerability in Apache Syncope.

Delegated administration security checks are based on Realm hierarchy and enforced via prefix matches.
Due to incorrect implementation, two sibling Realms whose names begin with the same string cannot be correctly distinguished, resulting in incorrect authorization.

This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.7, from 4.1.0-M0 through 4.1.2.

Users are recommended to upgrade to version 4.0.8 / 4.1.3, which fix this issue.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
apache	CNA	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Early Detection

Affected products identified ahead of NVD analysis through intelligence sources.

Vendor	Product	Version	Source
apache	syncope	𝑥 ≤ 3.0.16	CNA
apache	syncope	𝑥 ≤ 4.0.7	CNA
apache	syncope	𝑥 ≤ 4.1.2	CNA

Common Weakness Enumeration

CWE-863 - Incorrect Authorization
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.

References

https://lists.apache.org/thread/5m8t357n2xt38ym5l2rrgbjyztd97yjv

http://www.openwall.com/lists/oss-security/2026/09/14/7