Vulnerability · Published Sep 14, 2026 · Assigned by apache
CVE-2026-78336Apache Syncope: OIDCC4UI provider list discloses client secrets to any authenticated user
High 7.5
In plain English
A high-severity security flaw in Apache Syncope from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Official description
Insertion of sensitive information into sent data vulnerability in Apache Syncope. Any authenticated user can query for the list of available OIDC providers configured for SSO with Console and Enduser. The returned payload contains all configuration settings, including client secrets, regardless of the entitlements owned by the caller. 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache Syncope | 3.0.0-M0 – through 3.0.164.0.0-M0 – through 4.0.74.1.0-M0 – through 4.1.2 |
Weakness: CWE-201 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N