Improper Authentication in Apache Syncope - CVE-2026-87785
Published: September 15, 2026
Vulnerability identifier: #VU149997
CSH Severity: Low
CVSS v4: 6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-87785
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to spoof another user's privileges.
The vulnerability exists due to improper authentication in internal JWT authentication when configured JWKS settings are disclosed. A remote user can use a valid JWT after successfully authenticating to spoof another user's privileges.
Affected software
Apache Syncope
How to mitigate CVE-2026-87785
Install security update from vendor's website.
Apache Syncope - addressed in versions 4.0.8, 4.1.3