CVE-2020-27978

Name: CVE-2020-27978
Creator: NVD / NIST
Published: 2020-10-28T15:15:13.817+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.83%

Last modified Jun 17, 2026

CVE-2020-27978 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.83% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.83%

76.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Shibboleth	Identity Provider	>= 3.0.0, < 3.4.6

References

https://shibboleth.net/community/advisories/secadv_20191002.txtVendor Advisory
https://shibboleth.net/community/advisories/secadv_20191002.txtVendor Advisory

Timeline

Published: Oct 28, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27978?

How severe is CVE-2020-27978?

CVE-2020-27978 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.83% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27978?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-27978?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST