CVE-2020-5420

Name: CVE-2020-5420
Creator: NVD / NIST
Published: 2020-09-03T01:15:10.857+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.7/10EPSS 1.18%

Last modified Jun 17, 2026

CVE-2020-5420 is a high-severity vulnerability rated 7.7/10 on the CVSS scale. Cloud Foundry Routing (Gorouter) versions prior to 0.206.0 allow a malicious developer with "cf push" access to cause denial-of-service to the CF cluster by pushing an app that returns specially crafted HTTP responses that crash the Gorouters.. EPSS estimates a 1.18% chance of exploitation in the next 30 days.

Description

Cloud Foundry Routing (Gorouter) versions prior to 0.206.0 allow a malicious developer with "cf push" access to cause denial-of-service to the CF cluster by pushing an app that returns specially crafted HTTP responses that crash the Gorouters.

Metrics

CVSS 3.1

7.7/10

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

EPSS Probability

1.18%

63.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cloudfoundry	Cf-Deployment	< 13.15.0
Cloudfoundry	Gorouter	< 0.206.0

References

https://www.cloudfoundry.org/blog/cve-2020-5420Vendor Advisory
https://www.cloudfoundry.org/blog/cve-2020-5420Vendor Advisory

Timeline

Published: Sep 3, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-5420?

How severe is CVE-2020-5420?

CVE-2020-5420 has a CVSS score of 7.7/10 (HIGH severity). The EPSS model estimates a 1.18% probability of exploitation in the next 30 days.

How do I fix CVE-2020-5420?

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-2020-5420?

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

Scan your code now

Source: NVD / NIST