CVE-2017-2646: Red Hat Keycloak

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

It was found that when Keycloak before 2.5.5 receives a Logout request with a Extensions in the middle of the request, the SAMLSloRequestParser.parse() method ends in a infinite loop. An attacker could use this flaw to conduct denial of service attacks.

Affected products

• Red Hat Keycloak: before 2.5.5 (fixed in 2.5.5)

Published 2018-07-27. Last modified 2026-06-17.