High severity · published Sep 14, 2026
CVE-2026-87779
Apache Syncope: AES Secret Key disclosure via log output
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
Insertion of sensitive information into log file vulnerability in Apache Syncope.
When AES key of non-standard length (not 16/24/32 bytes) is configured, Syncope will pad the provided value with random characters. The resulting key value is logged.
This issue affects Apache Syncope: from 3.0.15 through 3.0.16, from 4.0.3 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:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% 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
3.0.15 through 3.0.16; 4.0.3 through 4.0.7; 4.1.0-M0 through 4.1.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-87779
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-87779
lists.apache.org
https://lists.apache.org/thread/3t3om8mny7ng52q053pdzpmtdtosnqoo
www.openwall.com
http://www.openwall.com/lists/oss-security/2026/09/14/23
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