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CVE-2020-8553

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

MEDIUM
5.9
CVSS Score
Published: July 29, 2020 at 02:53 PM UTC
Updated: June 17, 2026 at 03:26 AM UTC
1 product affected across 1 vendorIngress nginx

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Severity
MEDIUM5.9
Exploit prediction
EPSS 0.9%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ingress nginx· Kubernetes
95%
v < 0.28.0
Affected range stops below 0.28.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://github.com/kubernetes/ingress-nginx/issues/5126

CVSS

5.9MEDIUMkubernetes
Attack Vector
NETWORK
Complexity
HIGH
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-73CWE-610

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