---
title: "CVE-2026-78336: Apache Syncope - Information Disclosure"
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 information disclosure caused by returning OIDC provider configurations including client secrets to any authenticated user, letting attackers access sensitive configuration data, exploit requires authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-78336/
---

# CVE-2026-78336 Apache Syncope - Information Disclosure

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 information disclosure caused by returning OIDC provider configurations including client secrets to any authenticated user, letting attackers access sensitive configuration data, exploit requires authentication.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.43% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-78336)

## Details

Type

Information Disclosure

Impact

Information Disclosure

CVSS vector

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

Published

14 September 2026

Updated

15 October 2026

Weakness

[CWE-201](https://cwe.mitre.org/data/definitions/201.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-2026-78336](https://nvd.nist.gov/vuln/detail/CVE-2026-78336)
- [https://lists.apache.org/thread/h399sqmf4wgnfxxpd6x9lm3m672rrsjt](https://lists.apache.org/thread/h399sqmf4wgnfxxpd6x9lm3m672rrsjt)
- [http://www.openwall.com/lists/oss-security/2026/09/14/20](http://www.openwall.com/lists/oss-security/2026/09/14/20)

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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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