From c2aaa42bc28d9a876e541771d4d7dd2e9a367b60 Mon Sep 17 00:00:00 2001
From: Matteo Collina <hello@matteocollina.com>
Date: Fri, 26 Dec 2025 00:35:10 +0100
Subject: [PATCH] zlib: add CHECK to validate fast path input

---
 src/node_zlib.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/node_zlib.cc b/src/node_zlib.cc
index 1adbb7dda373f3..726e7e2d4e8e85 100644
--- a/src/node_zlib.cc
+++ b/src/node_zlib.cc
@@ -1685,6 +1685,7 @@ static uint32_t FastCRC32(v8::Local<v8::Value> receiver,
                           v8::FastApiCallbackOptions& options) {
   TRACK_V8_FAST_API_CALL("zlib.crc32");
   v8::HandleScope handle_scope(options.isolate);
+  CHECK(data->IsArrayBufferView() || data->IsString());
   return CRC32Impl(options.isolate, data, value);
 }