What’s Vulnerable › Vulnerabilities

CVE-2020-27978

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-10-28 · updated 2026-06-17
• Weakness: CWE-770

Description

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

How to fix

Upgrade to a fixed version: Shibboleth Identity Provider 3.4.6. Check the vendor advisory for mitigations.

References

• https://shibboleth.net/community/advisories/secadv_20191002.txt
• https://shibboleth.net/community/advisories/secadv_20191002.txt

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