CVE-2026-87779 Apache Syncope: AES Secret Key disclosure via log output
Attackers with log access can retrieve AES keys when non-standard key lengths are configured, compromising encryption security.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-87779?
CVE-2026-87779 is a high-severity vulnerability in Apache Syncope, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-532
Which versions are affected by CVE-2026-87779?
How do I fix CVE-2026-87779?
No fix has been published for CVE-2026-87779 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-87779 being exploited?
There is no known exploitation of CVE-2026-87779 in the wild and no public exploit code.
Sources
Also known as GHSA-2987-fvqf-8g2j.