by Kastro
Paper/Archive/CVE-2026-78330

CVE-2026-78330

Apache Software Foundation Apache Syncope — Apache Syncope: Privilege escalation for admin user via JWT authentication

EPSS 0.6%CVSS 9.8
critical.is priorityof 100
40
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 50.8.508 × 2010.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Apache Syncope3.0.0-M0 – 3.0.16–CNA
Apache Syncope4.0.0-M0 – 4.0.7–CNA
Apache Syncope4.1.0-M0 – 4.1.2–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorylists.apache.org/thread/vkqmmpwcdson285vtmzpbj9psw35hyo9refopenwall.com/lists/oss-security/2026/09/14/19