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9.8

Apache Syncope may grant admin rights to low‑privilege users

CVE-2026-78330 · published 11 days ago
Summary

Apache Syncope versions 3.0.0‑M0 through 3.0.16 and 4.0.0‑M0 through 4.1.2 can leak internal authentication settings. If an attacker learns these settings, they can turn a low‑level login token into an administrator token. Upgrade to version 4.0.8 or 4.1.3 to close the gap.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
apache software foundation apache syncope <= 3.0.16
Original advisory text
Incorrect privilege assignment vulnerability in Apache Syncope. When the configured JWKS settings for internal JWT authentication are disclosed (at least protocol and key), an attacker can obtain ...
Incorrect privilege assignment vulnerability in Apache Syncope.

When the configured JWKS settings for internal JWT authentication are disclosed (at least protocol and key), an attacker can obtain admin privileges after completing a successful authentication and obtaining a valid low-privileges JWT.



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.
References
Severity
9.8 Critical
Exploitation
EPSS <1%
Type
CWE-266Incorrect Privilege Assignment
Timeline
Published14 Sep 2026
Updated25 Sep 2026
First seen14 Sep 2026
Sources
CVE-2026-78330 · NVD
CVE-2026-78330 · MITRE
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