Critical severity · published Sep 14, 2026
CVE-2026-77181
Apache Syncope: ClientApp update entitlement not effective
9.8
CVSS
0.5%
EPSS
No
On KEV
Description
Incorrect Authorization vulnerability in Apache Syncope.
An administrator with ClientApp's update entitlement is unable to perform the related operation, while ClientApp's create entitlement is checked both for create and update operations on ClientApp.
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
Apache Syncope · Apache Software Foundation
3.0.0-M0 through 3.0.16; 4.0.0-M0 through 4.0.7; 4.1.0-M0 through 4.1.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-77181
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-77181
lists.apache.org
https://lists.apache.org/thread/swqj31jhbz7hmmkjy42461zp9rhh9lwy
www.openwall.com
http://www.openwall.com/lists/oss-security/2026/09/14/16
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