CVE-2026-78330

CVSS 9.8 (critical) · published 2026-09-14

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.

Weakness: CWE-266

Source: NVD CVE-2026-78330

References

• https://lists.apache.org/thread/vkqmmpwcdson285vtmzpbj9psw35hyo9
• http://www.openwall.com/lists/oss-security/2026/09/14/19

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