From 35f4ebfccb5672af65e3bacb0b6916240b021d37 Mon Sep 17 00:00:00 2001
From: Raj Shan <88.rajath@gmail.com>
Date: Thu, 27 Aug 2026 11:04:09 -0700
Subject: [PATCH] Fix intermittent CoreServices XPC crash in RCTBlobManager
 blob name derivation

---
 packages/react-native/Libraries/Blob/RCTBlobManager.mm | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/packages/react-native/Libraries/Blob/RCTBlobManager.mm b/packages/react-native/Libraries/Blob/RCTBlobManager.mm
index 8a4b6740ea15..4a29b1f826c9 100755
--- a/packages/react-native/Libraries/Blob/RCTBlobManager.mm
+++ b/packages/react-native/Libraries/Blob/RCTBlobManager.mm
@@ -297,11 +297,16 @@ - (id)handleNetworkingResponse:(NSURLResponse *)response data:(NSData *)data
   // An empty body will have nil for data, in this case we need to return
   // an empty blob as per the XMLHttpRequest spec.
   data = data ?: [NSData new];
+  // -[NSURLResponse suggestedFilename] resolves the filename through a
+  // CoreServices/UTType XPC lookup that can crash intermittently
+  // (NSXPCEncoder) when called off the main thread. Since whatwg-fetch reads
+  // every response as a blob, that lookup used to run for every network
+  // response. Derive the name from the URL instead; no XPC round-trip.
   return @{
     @"blobId" : [self store:data],
     @"offset" : @0,
     @"size" : @(data.length),
-    @"name" : RCTNullIfNil([response suggestedFilename]),
+    @"name" : RCTNullIfNil(response.URL.lastPathComponent),
     @"type" : RCTNullIfNil([response MIMEType]),
   };
 }