CVE-2026-73370 Apache Syncope - Broken Access Control

Apache Syncope 3.0.0-M0 through 3.0.16, 4.0.0-M0 through 4.0.7, and 4.1.0-M0 through 4.1.2 contain an incorrect authorization vulnerability caused by incomplete delegated administration security checks in the Reconciliation service's pull and push, letting administrators without adequate entitlements perform unauthorized actions, exploit requires attacker to be an authenticated administrator.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.51% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Broken Access Control
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
14 September 2026
Updated
15 October 2026
Weakness
CWE-863

Vendor fix

Upgrade to version 4.0.8 or 4.1.3.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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