CVE-2020-8553

Kubernetes ingress-nginx Compromise of auth via subset/superset namespace names

Description

The Kubernetes ingress-nginx component prior to version 0.28.0 allows a user with the ability to create namespaces and to read and create ingress objects to overwrite the password file of another ingress which uses nginx.ingress.kubernetes.io/auth-type: basic and which has a hyphenated namespace or secret name.

Categories

5.9
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.31%
Third-Party Advisory github.com
Affected: Kubernetes ingress-nginx
Published at:
Updated at:

References

Link Tags
https://github.com/kubernetes/ingress-nginx/issues/5126 third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-8553?
CVE-2020-8553 has been scored as a medium severity vulnerability.
How to fix CVE-2020-8553?
To fix CVE-2020-8553, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-8553 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-8553 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-8553?
CVE-2020-8553 affects Kubernetes ingress-nginx.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.