---
title: "CVE-2026-73579: Apache Syncope - Broken Access Control"
description: "Apache Syncope 3.0.0-M0 through 3.0.16, 4.0.0-M0 through 4.0.7, and 4.1.0-M0 through 4.1.2 contain an incorrect authorization vulnerability caused by an empty Realms filter in non-recursive search requests, letting attackers bypass permission restrictions, exploit requires crafted non-recursive search requests."
url: https://panop.io/threat-heartbeat/CVE-2026-73579/
---

# CVE-2026-73579 Apache Syncope - Broken Access Control

Apache Syncope 3.0.0-M0 through 3.0.16, 4.0.0-M0 through 4.0.7, and 4.1.0-M0 through 4.1.2 contain an incorrect authorization vulnerability caused by an empty Realms filter in non-recursive search requests, letting attackers bypass permission restrictions, exploit requires crafted non-recursive search requests.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.51% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-73579)

## Details

Type

Broken Access Control

Impact

Information Disclosure

CVSS vector

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

Published

14 September 2026

Updated

15 October 2026

Weakness

[CWE-863](https://cwe.mitre.org/data/definitions/863.html)

## Vendor fix

Upgrade to versions 4.0.8 or 4.1.3 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-73579](https://nvd.nist.gov/vuln/detail/CVE-2026-73579)
- [https://lists.apache.org/thread/ykwnkrt2b43d0wm1phh94pqqyjb6qyhx](https://lists.apache.org/thread/ykwnkrt2b43d0wm1phh94pqqyjb6qyhx)
- [http://www.openwall.com/lists/oss-security/2026/09/14/10](http://www.openwall.com/lists/oss-security/2026/09/14/10)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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