ℹ This issue has been addressed in https://github.com/cert-manager/cert-manager/releases/tag/v1.18.1

ℹ Read release-notes-1.18 to learn more about the problem and the work arounds.

Describe the bug:

After v1.18 when issuing a new certificate I got an error:

4m36s Warning PresentError challenge/cms-tls-1-3184104856-2172708158 Error presenting challenge: admission webhook "validate.nginx.ingress.kubernetes.io" denied the request: ingress contains invalid paths: path /.well-known/acme-challenge/oTw4h9_WsobTRn5COTSyaiAx3aWn0M7_aYisoz1gXQw cannot be used with pathType Exact

Expected behaviour:

Certificate should be issued.

Steps to reproduce the bug:

• cert-manager v1.18
• Simple ingress

  apiVersion: networking.k8s.io/v1
  kind: Ingress
  metadata:
    name: example-ingress
    namespace: example
    annotations:
      kubernetes.io/ingress.class: nginx
      cert-manager.io/cluster-issuer: letsencrypt-prod
  spec:
    tls:
      - hosts:
          - example.com
        secretName: example-tls
    rules:
      - host: example.com
        http:
          paths:
            - path: /
              pathType: Prefix
              backend:
                service:
                  name: example
                  port:
                    name: http

Anything else we need to know?:

Environment details:

• Kubernetes version: 1.31.2
• cert-manager version: 1.18
• Install method: helm

/kind bug