CVE-2025-15566

ingress-nginx auth-proxy-set-headers nginx configuration injection

Published Feb 6, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
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.)

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

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

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
kubernetes
Published
Updated
Feb 26, 2026, 3:04 PM
Reserved
Feb 5, 2026, 11:44 PM
Status
Deferred
Published
Feb 6, 2026, 4:15 AM
Modified
Jun 17, 2026, 8:38 AM