CVE-2025-1097: ingress-nginx controller - configuration injection via unsanitized auth-tls-match-cn annotation

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 37.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-03-25 · updated 2026-06-17
Weakness: CWE-20

Description

A security issue was discovered in ingress-nginx https://github.com/kubernetes/ingress-nginx where the `auth-tls-match-cn` 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.)

Affected products

Kubernetes ingress-nginx: through 1.11.4; 1.12.0

References

https://github.com/kubernetes/kubernetes/issues/131007
https://security.netapp.com/advisory/ntap-20250328-0008/
https://www.exploit-db.com/exploits/52475

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