Add fuzz test for the CDN-Loop header parser

test/extensions/filters/http/cdn_loop/BUILD

@@ -1,5 +1,6 @@
 load(
     "//bazel:envoy_build_system.bzl",
+    "envoy_cc_fuzz_test",
     "envoy_cc_test",
     "envoy_package",
 )
@@ -17,6 +18,16 @@ envoy_cc_test(
     ],
 )
 
+envoy_cc_fuzz_test(
+    name = "parser_fuzz_test",
+    srcs = ["parser_fuzz_test.cc"],
+    corpus = "parser_corpus",
+    deps = [
+        "//source/extensions/filters/http/cdn_loop:parser_lib",
+        "//test/test_common:status_utility_lib",
+    ],
+)
+
 envoy_cc_test(
     name = "utils_test",
     srcs = ["utils_test.cc"],

test/extensions/filters/http/cdn_loop/parser_fuzz_test.cc

@@ -0,0 +1,19 @@
+#include "extensions/filters/http/cdn_loop/parser.h"
+
+#include "test/fuzz/fuzz_runner.h"
+
+#include "absl/strings/string_view.h"
+
+namespace Envoy {
+namespace Fuzz {
+
+DEFINE_FUZZER(const uint8_t* buf, size_t len) {
+  {
+    Envoy::Extensions::HttpFilters::CdnLoop::Parser::ParseContext input(
+        absl::string_view(reinterpret_cast<const char*>(buf), len));
+    Envoy::Extensions::HttpFilters::CdnLoop::Parser::parseCdnInfoList(input).IgnoreError();
+  }
+}
+
+} // namespace Fuzz
+} // namespace Envoy