CVE-2020-5420: Cloud Foundry Routing (Gorouter) versions prior to 0.206.0 allow a malicious developer with "cf push" access t

Q: How do I fix CVE-2020-5420?

cf-deployment: upgrade to 13.15.0; gorouter: upgrade to 0.206.0. Exact commands for each OS are on this page.

Q: Is CVE-2020-5420 being exploited?

CVE-2020-5420 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-5420 affect?

CVE-2020-5420 affects cf-deployment, gorouter. Severity is high (CVSS 7.7). 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 Goroute

This month

HIGH 7.7UPGRADEUPGRADE

CVE-2020-5420 is a high-severity flaw (CVSS 7.7) affecting cf-deployment, gorouter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.7 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-754
Published	2020-09-03
Last modified	2026-06-17

Publisher (CNA): Pivotal Software, Inc. · Vendor: cloudfoundry

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-09-03 01:15 UTCPublished CVE record published
2026-06-17 03:21 UTCUpdated Record last modified

cloudfoundry cf-deployment UPGRADE

Affected: < 13.15.0

Fixed in: 13.15.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cf-deployment || rpm -q cf-deployment || cf-deployment --version

2. UPGRADE to 13.15.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cf-deployment

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cf-deployment

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

cloudfoundry gorouter UPGRADE

Affected: < 0.206.0

Fixed in: 0.206.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy gorouter || rpm -q gorouter || gorouter --version

2. UPGRADE to 0.206.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade gorouter

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gorouter

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-5420?

cf-deployment: upgrade to 13.15.0; gorouter: upgrade to 0.206.0. Exact commands for each OS are on this page.

Is CVE-2020-5420 being exploited?

CVE-2020-5420 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-5420 affect?

CVE-2020-5420 affects cf-deployment, gorouter. Severity is high (CVSS 7.7). 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 Goroute

How urgent is CVE-2020-5420?

Priority 44/100. High severity

Related CVEs

CVE-2026-22726 MEDIUM 5.0 UPGRADE UPGRADE Route Services can be leveraged to send app traffic to network destinations outside of an app's configured egr
CVE-2026-22723 MEDIUM 6.5 UPGRADE UPGRADE Inappropriate user token revocation due to a logic error in the token revocation endpoint implementation in Cl
CVE-2025-22246 LOW 3.0 UPGRADE UPGRADE Cloud Foundry UAA release versions from v77.21.0 to v7.31.0 are vulnerable to a private key exposure in logs.
CVE-2024-22279 MEDIUM 5.9 UPGRADE UPGRADE Improper handling of requests in Routing Release > v0.273.0 and <= v0.297.0 allows an unauthenticated attacker
CVE-2023-34041 MEDIUM 5.3 UPGRADE UPGRADE Cloud foundry routing release versions prior to 0.278.0 are vulnerable to abuse of HTTP Hop-by-Hop Headers

References

← Back to latest CVEs