Description
A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/auth-proxy-set-headers` 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.)
Published: 2026-02-06
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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Remediation

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Tracking

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History

Fri, 06 Feb 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 06 Feb 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Kubernetes
Kubernetes ingress-nginx
Vendors & Products Kubernetes
Kubernetes ingress-nginx

Fri, 06 Feb 2026 04:15:00 +0000

Type Values Removed Values Added
Description A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/auth-proxy-set-headers` 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.)
Title ingress-nginx auth-proxy-set-headers nginx configuration injection
Weaknesses CWE-20
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}


Subscriptions

Kubernetes Ingress-nginx
cve-icon MITRE

Status: PUBLISHED

Assigner: kubernetes

Published:

Updated: 2026-02-26T15:04:16.591Z

Reserved: 2026-02-05T23:44:40.775Z

Link: CVE-2025-15566

cve-icon Vulnrichment

Updated: 2026-02-06T15:45:34.531Z

cve-icon NVD

Status : Deferred

Published: 2026-02-06T04:15:51.960

Modified: 2026-04-15T00:35:42.020

Link: CVE-2025-15566

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-06T12:04:49Z

Weaknesses