Apache Syncope < 4.0.8 / < 4.1.3: Sensitive Data Exposure via REST
CVE-2026-73178 Published on September 14, 2026
Apache Syncope: JWT Access Token takeover
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Syncope.
An administrator with adequate entitlements can get access via REST to the list of existing Access Tokens, including their signed JWT body.
These values can be then used to perform further REST requests, impersonating users with higher administration entitlements.
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.
Vulnerability Analysis
CVE-2026-73178 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is an Information Disclosure Vulnerability?
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
CVE-2026-73178 has been classified to as an Information Disclosure vulnerability or weakness.
Products Associated with CVE-2026-73178
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Affected Versions
Apache Software Foundation Apache Syncope:- Version 3.0.0-M0, <= 3.0.16 is affected.
- Version 4.0.0-M0, <= 4.0.7 is affected.
- Version 4.1.0-M0, <= 4.1.2 is affected.