diff --git a/actual-budget/networkpolicy.yaml b/actual-budget/networkpolicy.yaml
index e0064fe..276a5b9 100644
--- a/actual-budget/networkpolicy.yaml
+++ b/actual-budget/networkpolicy.yaml
@@ -55,3 +55,29 @@ spec:
               - 169.254.0.0/16
               - 172.16.0.0/12
               - 192.168.0.0/16
+---
+# cert-manager's HTTP-01 solver, which runs only while a certificate
+# renews: Let's Encrypt and cert-manager's own self check reach it on 8089
+# through Envoy. The policies above let Envoy reach the app's port only,
+# which left the solver unreachable (found 2026-10-26, when ynab's renewal
+# hung).
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: acme-http01-solver
+spec:
+  podSelector:
+    matchLabels:
+      acme.cert-manager.io/http01-solver: "true"
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: envoy-gateway-system
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: envoy
+      ports:
+        - port: 8089
diff --git a/authentik/networkpolicy.yaml b/authentik/networkpolicy.yaml
index ecf167d..f9f75b4 100644
--- a/authentik/networkpolicy.yaml
+++ b/authentik/networkpolicy.yaml
@@ -135,3 +135,29 @@ spec:
             cidr: 192.168.1.204/32
       ports:
         - port: 16443
+---
+# cert-manager's HTTP-01 solver, which runs only while a certificate
+# renews: Let's Encrypt and cert-manager's own self check reach it on 8089
+# through Envoy. The policies above let Envoy reach the app's port only,
+# which left the solver unreachable (found 2026-10-26, when ynab's renewal
+# hung).
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: acme-http01-solver
+spec:
+  podSelector:
+    matchLabels:
+      acme.cert-manager.io/http01-solver: "true"
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: envoy-gateway-system
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: envoy
+      ports:
+        - port: 8089
diff --git a/bolletjestrui/networkpolicy.yaml b/bolletjestrui/networkpolicy.yaml
index c66b200..a248b60 100644
--- a/bolletjestrui/networkpolicy.yaml
+++ b/bolletjestrui/networkpolicy.yaml
@@ -54,3 +54,29 @@ spec:
               - 169.254.0.0/16
               - 172.16.0.0/12
               - 192.168.0.0/16
+---
+# cert-manager's HTTP-01 solver, which runs only while a certificate
+# renews: Let's Encrypt and cert-manager's own self check reach it on 8089
+# through Envoy. The policies above let Envoy reach the app's port only,
+# which left the solver unreachable (found 2026-10-26, when ynab's renewal
+# hung).
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: acme-http01-solver
+spec:
+  podSelector:
+    matchLabels:
+      acme.cert-manager.io/http01-solver: "true"
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: envoy-gateway-system
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: envoy
+      ports:
+        - port: 8089
diff --git a/freshrss/networkpolicy.yaml b/freshrss/networkpolicy.yaml
index 700702b..0656542 100644
--- a/freshrss/networkpolicy.yaml
+++ b/freshrss/networkpolicy.yaml
@@ -56,3 +56,29 @@ spec:
               - 169.254.0.0/16
               - 172.16.0.0/12
               - 192.168.0.0/16
+---
+# cert-manager's HTTP-01 solver, which runs only while a certificate
+# renews: Let's Encrypt and cert-manager's own self check reach it on 8089
+# through Envoy. The policies above let Envoy reach the app's port only,
+# which left the solver unreachable (found 2026-10-26, when ynab's renewal
+# hung).
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: acme-http01-solver
+spec:
+  podSelector:
+    matchLabels:
+      acme.cert-manager.io/http01-solver: "true"
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: envoy-gateway-system
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: envoy
+      ports:
+        - port: 8089
diff --git a/gatus/networkpolicy.yaml b/gatus/networkpolicy.yaml
index 1791dbf..5825a48 100644
--- a/gatus/networkpolicy.yaml
+++ b/gatus/networkpolicy.yaml
@@ -83,3 +83,29 @@ spec:
             cidr: 192.168.1.204/32
       ports:
         - port: 16443
+---
+# cert-manager's HTTP-01 solver, which runs only while a certificate
+# renews: Let's Encrypt and cert-manager's own self check reach it on 8089
+# through Envoy. The policies above let Envoy reach the app's port only,
+# which left the solver unreachable (found 2026-10-26, when ynab's renewal
+# hung).
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: acme-http01-solver
+spec:
+  podSelector:
+    matchLabels:
+      acme.cert-manager.io/http01-solver: "true"
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: envoy-gateway-system
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: envoy
+      ports:
+        - port: 8089
diff --git a/gitea/networkpolicy.yaml b/gitea/networkpolicy.yaml
index 39de7f4..55f3c8b 100644
--- a/gitea/networkpolicy.yaml
+++ b/gitea/networkpolicy.yaml
@@ -55,3 +55,29 @@ spec:
               - 169.254.0.0/16
               - 172.16.0.0/12
               - 192.168.0.0/16
+---
+# cert-manager's HTTP-01 solver, which runs only while a certificate
+# renews: Let's Encrypt and cert-manager's own self check reach it on 8089
+# through Envoy. The policies above let Envoy reach the app's port only,
+# which left the solver unreachable (found 2026-10-26, when ynab's renewal
+# hung).
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: acme-http01-solver
+spec:
+  podSelector:
+    matchLabels:
+      acme.cert-manager.io/http01-solver: "true"
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: envoy-gateway-system
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: envoy
+      ports:
+        - port: 8089
diff --git a/immich/networkpolicy.yaml b/immich/networkpolicy.yaml
index 325a93e..c292815 100644
--- a/immich/networkpolicy.yaml
+++ b/immich/networkpolicy.yaml
@@ -100,3 +100,29 @@ spec:
             cidr: 192.168.1.204/32
       ports:
         - port: 16443
+---
+# cert-manager's HTTP-01 solver, which runs only while a certificate
+# renews: Let's Encrypt and cert-manager's own self check reach it on 8089
+# through Envoy. The policies above let Envoy reach the app's port only,
+# which left the solver unreachable (found 2026-10-26, when ynab's renewal
+# hung).
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: acme-http01-solver
+spec:
+  podSelector:
+    matchLabels:
+      acme.cert-manager.io/http01-solver: "true"
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: envoy-gateway-system
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: envoy
+      ports:
+        - port: 8089
diff --git a/mbgwp/networkpolicy.yaml b/mbgwp/networkpolicy.yaml
index 3f14564..49bcfa0 100644
--- a/mbgwp/networkpolicy.yaml
+++ b/mbgwp/networkpolicy.yaml
@@ -85,3 +85,29 @@ spec:
               kubernetes.io/metadata.name: mariadb-system
       ports:
         - port: 3306
+---
+# cert-manager's HTTP-01 solver, which runs only while a certificate
+# renews: Let's Encrypt and cert-manager's own self check reach it on 8089
+# through Envoy. The policies above let Envoy reach the app's port only,
+# which left the solver unreachable (found 2026-10-26, when ynab's renewal
+# hung).
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: acme-http01-solver
+spec:
+  podSelector:
+    matchLabels:
+      acme.cert-manager.io/http01-solver: "true"
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: envoy-gateway-system
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: envoy
+      ports:
+        - port: 8089
diff --git a/ntfy/networkpolicy.yaml b/ntfy/networkpolicy.yaml
index 1eb485c..d5b9521 100644
--- a/ntfy/networkpolicy.yaml
+++ b/ntfy/networkpolicy.yaml
@@ -65,3 +65,29 @@ spec:
               - 169.254.0.0/16
               - 172.16.0.0/12
               - 192.168.0.0/16
+---
+# cert-manager's HTTP-01 solver, which runs only while a certificate
+# renews: Let's Encrypt and cert-manager's own self check reach it on 8089
+# through Envoy. The policies above let Envoy reach the app's port only,
+# which left the solver unreachable (found 2026-10-26, when ynab's renewal
+# hung).
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: acme-http01-solver
+spec:
+  podSelector:
+    matchLabels:
+      acme.cert-manager.io/http01-solver: "true"
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: envoy-gateway-system
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: envoy
+      ports:
+        - port: 8089
diff --git a/serpbear/networkpolicy.yaml b/serpbear/networkpolicy.yaml
index 303f07c..4163594 100644
--- a/serpbear/networkpolicy.yaml
+++ b/serpbear/networkpolicy.yaml
@@ -54,3 +54,29 @@ spec:
               - 169.254.0.0/16
               - 172.16.0.0/12
               - 192.168.0.0/16
+---
+# cert-manager's HTTP-01 solver, which runs only while a certificate
+# renews: Let's Encrypt and cert-manager's own self check reach it on 8089
+# through Envoy. The policies above let Envoy reach the app's port only,
+# which left the solver unreachable (found 2026-10-26, when ynab's renewal
+# hung).
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: acme-http01-solver
+spec:
+  podSelector:
+    matchLabels:
+      acme.cert-manager.io/http01-solver: "true"
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: envoy-gateway-system
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: envoy
+      ports:
+        - port: 8089
diff --git a/vault/networkpolicy.yaml b/vault/networkpolicy.yaml
index 125e3b9..82a3afa 100644
--- a/vault/networkpolicy.yaml
+++ b/vault/networkpolicy.yaml
@@ -66,3 +66,29 @@ spec:
               - 169.254.0.0/16
               - 172.16.0.0/12
               - 192.168.0.0/16
+---
+# cert-manager's HTTP-01 solver, which runs only while a certificate
+# renews: Let's Encrypt and cert-manager's own self check reach it on 8089
+# through Envoy. The policies above let Envoy reach the app's port only,
+# which left the solver unreachable (found 2026-10-26, when ynab's renewal
+# hung).
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: acme-http01-solver
+spec:
+  podSelector:
+    matchLabels:
+      acme.cert-manager.io/http01-solver: "true"
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: envoy-gateway-system
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: envoy
+      ports:
+        - port: 8089