CVE-2026-73178 Apache Syncope - Information Disclosure & Privilege Escalation

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 information disclosure vulnerability caused by administrator access to signed JWT access tokens via REST, letting administrators impersonate higher privileged users, exploit requires administrator entitlements.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.43% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Information Disclosure
Impact
Information Disclosure, Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
14 September 2026
Updated
15 October 2026
Weakness
CWE-200

Vendor fix

Upgrade to versions 4.0.8 or 4.1.3 or later.

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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