CVE-2020-27978: Shibboleth Identity Provider

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

Shibboleth Identify Provider 3.x before 3.4.6 has a denial of service flaw. A remote unauthenticated attacker can cause a login flow to trigger Java heap exhaustion due to the creation of objects in the Java Servlet container session.

Affected products

• Shibboleth Identity Provider: from 3.0.0, before 3.4.6 (fixed in 3.4.6)

Published 2020-10-28. Last modified 2026-06-17.