What is CVE-2020-5401?

CVE-2020-5401 is a medium-severity vulnerability in Cloud Foundry Routing, classified under CWE-393. CVSS score: 5.3/10. Published 2020-02-27.

How severe is CVE-2020-5401?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Cloud Foundry Routing

CVE-2020-5401

Cloud Foundry Routing Release, versions prior to 0.197.0, contains GoRouter, which allows malicious clients to send invalid headers, causing caching layers to reject subsequent legitimate clients trying to access the app.

Published 2020-02-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.010 (63.3th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Cloud Foundry Routing — versions unspecified
Cloudfoundry Routing Release

Weakness classification (CWE)

References

www.cloudfoundry.org/blog/cve-2020-5401 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-5401?: CVE-2020-5401 is a medium-severity vulnerability in Cloud Foundry Routing, classified under CWE-393. CVSS score: 5.3/10. Published 2020-02-27.
How severe is CVE-2020-5401?: Medium severity. CVSS v3 base score is 5.3 out of 10.