Resource exhaustion in Keycloak - CVE-2026-16100
Published: August 6, 2026
Vulnerability identifier: #VU141172
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-16100
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in user-event metrics recording when processing failed account operations with request-controlled error text. A remote user can submit crafted requests with unique input values to cause a denial of service.
Only instances with metrics enabled are vulnerable.
Affected software
Keycloak
How to mitigate CVE-2026-16100
Install security update from vendor's website.
Keycloak - addressed in versions 26.4.14, 26.6.5, 26.7.1