diff --git a/api_names_out.yaml b/api_names_out.yaml
index dd27b458b0a..74d0e48b694 100644
--- a/api_names_out.yaml
+++ b/api_names_out.yaml
@@ -337239,6 +337239,7 @@
 "/networksecurity:v1beta1/MirroringEndpointGroupAssociation/mirroringEndpointGroup": mirroring_endpoint_group
 "/networksecurity:v1beta1/MirroringEndpointGroupAssociation/name": name
 "/networksecurity:v1beta1/MirroringEndpointGroupAssociation/network": network
+"/networksecurity:v1beta1/MirroringEndpointGroupAssociation/networkCookie": network_cookie
 "/networksecurity:v1beta1/MirroringEndpointGroupAssociation/reconciling": reconciling
 "/networksecurity:v1beta1/MirroringEndpointGroupAssociation/state": state
 "/networksecurity:v1beta1/MirroringEndpointGroupAssociation/updateTime": update_time
diff --git a/generated/google-apis-networksecurity_v1beta1/CHANGELOG.md b/generated/google-apis-networksecurity_v1beta1/CHANGELOG.md
index 891136d0770..4fd38669577 100644
--- a/generated/google-apis-networksecurity_v1beta1/CHANGELOG.md
+++ b/generated/google-apis-networksecurity_v1beta1/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Release history for google-apis-networksecurity_v1beta1
 
+### v0.67.0 (2026-07-05)
+
+* Regenerated from discovery document revision 20260617
+
 ### v0.66.0 (2026-06-14)
 
 * Regenerated from discovery document revision 20260524
diff --git a/generated/google-apis-networksecurity_v1beta1/lib/google/apis/networksecurity_v1beta1/classes.rb b/generated/google-apis-networksecurity_v1beta1/lib/google/apis/networksecurity_v1beta1/classes.rb
index a2667423ee3..225424f9acf 100644
--- a/generated/google-apis-networksecurity_v1beta1/lib/google/apis/networksecurity_v1beta1/classes.rb
+++ b/generated/google-apis-networksecurity_v1beta1/lib/google/apis/networksecurity_v1beta1/classes.rb
@@ -4138,6 +4138,13 @@ class MirroringEndpointGroupAssociation
         # @return [String]
         attr_accessor :network
       
+        # Output only. Identifier used by the data-path. See the NSI GENEVE format for
+        # more details: https://docs.cloud.google.com/network-security-integration/docs/
+        # understand-geneve#network_id
+        # Corresponds to the JSON property `networkCookie`
+        # @return [Fixnum]
+        attr_accessor :network_cookie
+      
         # Output only. The current state of the resource does not match the user's
         # intended state, and the system is working to reconcile them. This part of the
         # normal operation (e.g. adding a new location to the target deployment group).
@@ -4171,6 +4178,7 @@ def update!(**args)
           @mirroring_endpoint_group = args[:mirroring_endpoint_group] if args.key?(:mirroring_endpoint_group)
           @name = args[:name] if args.key?(:name)
           @network = args[:network] if args.key?(:network)
+          @network_cookie = args[:network_cookie] if args.key?(:network_cookie)
           @reconciling = args[:reconciling] if args.key?(:reconciling)
           @state = args[:state] if args.key?(:state)
           @update_time = args[:update_time] if args.key?(:update_time)
diff --git a/generated/google-apis-networksecurity_v1beta1/lib/google/apis/networksecurity_v1beta1/gem_version.rb b/generated/google-apis-networksecurity_v1beta1/lib/google/apis/networksecurity_v1beta1/gem_version.rb
index e7563450e81..22a86b8d561 100644
--- a/generated/google-apis-networksecurity_v1beta1/lib/google/apis/networksecurity_v1beta1/gem_version.rb
+++ b/generated/google-apis-networksecurity_v1beta1/lib/google/apis/networksecurity_v1beta1/gem_version.rb
@@ -16,13 +16,13 @@ module Google
   module Apis
     module NetworksecurityV1beta1
       # Version of the google-apis-networksecurity_v1beta1 gem
-      GEM_VERSION = "0.66.0"
+      GEM_VERSION = "0.67.0"
 
       # Version of the code generator used to generate this client
       GENERATOR_VERSION = "0.19.0"
 
       # Revision of the discovery document this client was generated from
-      REVISION = "20260524"
+      REVISION = "20260617"
     end
   end
 end
diff --git a/generated/google-apis-networksecurity_v1beta1/lib/google/apis/networksecurity_v1beta1/representations.rb b/generated/google-apis-networksecurity_v1beta1/lib/google/apis/networksecurity_v1beta1/representations.rb
index ecf346c02a6..ae70c48cb58 100644
--- a/generated/google-apis-networksecurity_v1beta1/lib/google/apis/networksecurity_v1beta1/representations.rb
+++ b/generated/google-apis-networksecurity_v1beta1/lib/google/apis/networksecurity_v1beta1/representations.rb
@@ -1894,6 +1894,7 @@ class Representation < Google::Apis::Core::JsonRepresentation
           property :mirroring_endpoint_group, as: 'mirroringEndpointGroup'
           property :name, as: 'name'
           property :network, as: 'network'
+          property :network_cookie, as: 'networkCookie'
           property :reconciling, as: 'reconciling'
           property :state, as: 'state'
           property :update_time, as: 'updateTime'