CVE-2026-1580
Unknown Unknown - Not Provided
Arbitrary Code Execution via Ingress Annotation in ingress-nginx

Publication date: 2026-02-03

Last updated on: 2026-02-03

Assigner: Kubernetes

Description
A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/auth-method` Ingress annotation can be used to inject configuration into nginx. This can lead to arbitrary code execution in the context of the ingress-nginx controller, and disclosure of Secrets accessible to the controller. (Note that in the default installation, the controller can access all Secrets cluster-wide.)
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Meta Information
Published
2026-02-03
Last Modified
2026-02-03
Generated
2026-06-16
AI Q&A
2026-02-04
EPSS Evaluated
2026-06-15
NVD
CVE-2026-1580
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
ingress-nginx ingress-nginx *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
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Executive Summary

This vulnerability exists in ingress-nginx where the Ingress annotation `nginx.ingress.kubernetes.io/auth-method` can be exploited to inject arbitrary configuration into nginx.

As a result, an attacker can execute arbitrary code within the context of the ingress-nginx controller.

Additionally, the attacker can gain access to Secrets that the controller can access, which by default includes all Secrets cluster-wide.

Impact Analysis

This vulnerability can have severe impacts including:

  • Arbitrary code execution within the ingress-nginx controller, potentially allowing full control over the controller.
  • Disclosure of sensitive information by accessing Secrets that the controller has access to, which may include credentials or other confidential data.
  • Potential disruption of services due to the compromise of the ingress controller.
Compliance Impact

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