CVE-2026-78330
Critical
Description
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductApache Syncope
PublishedSep 14, 2026
First seenSep 14, 2026
Weakness typeCWE-266CWE-266
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Apache Software Foundation Apache Syncope | 3.0.0-M0 ≤ v ≤ 3.0.16, 4.0.0-M0 ≤ v ≤ 4.0.7, 4.1.0-M0 ≤ v ≤ 4.1.2 | — |
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