diff --git a/api/envoy/extensions/filters/http/kill_request/v3/kill_request.proto b/api/envoy/extensions/filters/http/kill_request/v3/kill_request.proto
index fc531923aeaf4..989239b3cfbcb 100644
--- a/api/envoy/extensions/filters/http/kill_request/v3/kill_request.proto
+++ b/api/envoy/extensions/filters/http/kill_request/v3/kill_request.proto
@@ -6,6 +6,7 @@ import "envoy/type/v3/percent.proto";
 
 import "udpa/annotations/status.proto";
 import "udpa/annotations/versioning.proto";
+import "validate/validate.proto";
 
 option java_package = "io.envoyproxy.envoy.extensions.filters.http.kill_request.v3";
 option java_outer_classname = "KillRequestProto";
@@ -22,5 +23,6 @@ message KillRequest {
   type.v3.FractionalPercent probability = 1;
 
   // The name of the kill request header. If this field is not empty, it will override the :ref:`default header <config_http_filters_kill_request_http_header>` name. Otherwise the default header name will be used.
-  string kill_request_header = 2;
+  string kill_request_header = 2
+      [(validate.rules).string = {well_known_regex: HTTP_HEADER_VALUE strict: false}];
 }
diff --git a/generated_api_shadow/envoy/extensions/filters/http/kill_request/v3/kill_request.proto b/generated_api_shadow/envoy/extensions/filters/http/kill_request/v3/kill_request.proto
index fc531923aeaf4..989239b3cfbcb 100644
--- a/generated_api_shadow/envoy/extensions/filters/http/kill_request/v3/kill_request.proto
+++ b/generated_api_shadow/envoy/extensions/filters/http/kill_request/v3/kill_request.proto
@@ -6,6 +6,7 @@ import "envoy/type/v3/percent.proto";
 
 import "udpa/annotations/status.proto";
 import "udpa/annotations/versioning.proto";
+import "validate/validate.proto";
 
 option java_package = "io.envoyproxy.envoy.extensions.filters.http.kill_request.v3";
 option java_outer_classname = "KillRequestProto";
@@ -22,5 +23,6 @@ message KillRequest {
   type.v3.FractionalPercent probability = 1;
 
   // The name of the kill request header. If this field is not empty, it will override the :ref:`default header <config_http_filters_kill_request_http_header>` name. Otherwise the default header name will be used.
-  string kill_request_header = 2;
+  string kill_request_header = 2
+      [(validate.rules).string = {well_known_regex: HTTP_HEADER_VALUE strict: false}];
 }
diff --git a/test/extensions/filters/http/common/fuzz/filter_corpus/testcase-5711391867666432 b/test/extensions/filters/http/common/fuzz/filter_corpus/testcase-5711391867666432
new file mode 100644
index 0000000000000..6c6591ebb5684
--- /dev/null
+++ b/test/extensions/filters/http/common/fuzz/filter_corpus/testcase-5711391867666432
@@ -0,0 +1,14 @@
+config {
+  name: "envoy.filters.http.kill_request"
+  typed_config {
+    type_url: "type.googleapis.com/envoy.extensions.filters.http.kill_request.v3.KillRequest"
+    value: "\022Xenv: \"envoy.filters.http.health_check\"\n  typed_config {\n    type_oy.type.v3.Fractio\
+nalPe"
+  }
+}
+
+
+
+
+
+