diff --git a/app/Services/Social/LinkedInPagePublisher.php b/app/Services/Social/LinkedInPagePublisher.php
index 5d443505..f2fc484b 100644
--- a/app/Services/Social/LinkedInPagePublisher.php
+++ b/app/Services/Social/LinkedInPagePublisher.php
@@ -274,15 +274,19 @@ private function uploadImage($mediaItem, string $ownerUrn): ?string
                 $tempFile = $optimizedPath;
             }
 
-            $imageContent = file_get_contents($tempFile);
+            $stream = fopen($tempFile, 'r');
 
             $uploadResponse = Http::withToken($this->accessToken)
                 ->withHeaders([
                     'Content-Type' => 'application/octet-stream',
                 ])
-                ->withBody($imageContent, 'application/octet-stream')
+                ->withBody($stream, 'application/octet-stream')
                 ->put($uploadUrl);
 
+            if (is_resource($stream)) {
+                fclose($stream);
+            }
+
             if ($uploadResponse->failed()) {
                 Log::error('LinkedIn Page image upload failed', ['body' => $uploadResponse->body()]);
                 $this->handleApiError($uploadResponse);
diff --git a/app/Services/Social/LinkedInPublisher.php b/app/Services/Social/LinkedInPublisher.php
index 37d81c89..5d9605e3 100644
--- a/app/Services/Social/LinkedInPublisher.php
+++ b/app/Services/Social/LinkedInPublisher.php
@@ -255,15 +255,19 @@ private function uploadImage($mediaItem, string $ownerUrn): ?string
                 $tempFile = $optimizedPath;
             }
 
-            $imageContent = file_get_contents($tempFile);
+            $stream = fopen($tempFile, 'r');
 
             $uploadResponse = Http::withToken($this->accessToken)
                 ->withHeaders([
                     'Content-Type' => 'application/octet-stream',
                 ])
-                ->withBody($imageContent, 'application/octet-stream')
+                ->withBody($stream, 'application/octet-stream')
                 ->put($uploadUrl);
 
+            if (is_resource($stream)) {
+                fclose($stream);
+            }
+
             if ($uploadResponse->failed()) {
                 Log::error('LinkedIn image upload failed', ['body' => $uploadResponse->body()]);
                 $this->handleApiError($uploadResponse);
diff --git a/app/Services/Social/MastodonPublisher.php b/app/Services/Social/MastodonPublisher.php
index 073a3e4f..fa962cd1 100644
--- a/app/Services/Social/MastodonPublisher.php
+++ b/app/Services/Social/MastodonPublisher.php
@@ -87,10 +87,16 @@ private function uploadMedia(SocialAccount $account, string $instance, string $u
                 $name = 'media';
             }
 
+            $stream = fopen($tempFile, 'r');
+
             $response = Http::withToken($account->access_token)
-                ->attach('file', fopen($tempFile, 'r'), $name)
+                ->attach('file', $stream, $name)
                 ->post("{$instance}/api/v1/media");
 
+            if (is_resource($stream)) {
+                fclose($stream);
+            }
+
             if ($response->failed()) {
                 Log::error('Mastodon media upload failed', [
                     'status' => $response->status(),
diff --git a/app/Services/Social/PinterestPublisher.php b/app/Services/Social/PinterestPublisher.php
index 28f7e97c..b67f2fcd 100644
--- a/app/Services/Social/PinterestPublisher.php
+++ b/app/Services/Social/PinterestPublisher.php
@@ -161,36 +161,35 @@ private function publishVideoPin(PostPlatform $postPlatform): array
 
         // Download video to temp file (memory-safe)
         $tempFile = tempnam(sys_get_temp_dir(), 'pin_video_');
-        Http::withOptions(['sink' => $tempFile])->timeout(600)->get($media->url);
+        $videoStream = null;
 
-        $videoContent = fopen($tempFile, 'r');
+        try {
+            Http::withOptions(['sink' => $tempFile])->timeout(600)->get($media->url);
 
-        if ($videoContent === false) {
+            $videoStream = fopen($tempFile, 'r');
+
+            if ($videoStream === false) {
+                throw new \Exception('Failed to read video file');
+            }
+
+            $multipart[] = [
+                'name' => 'file',
+                'contents' => $videoStream,
+                'filename' => basename($media->url),
+            ];
+
+            $uploadResponse = Http::asMultipart()
+                ->timeout(600)
+                ->post($uploadUrl, $multipart);
+
+            if ($uploadResponse->failed()) {
+                $this->handleApiError($uploadResponse);
+            }
+        } finally {
+            if ($videoStream !== null && is_resource($videoStream)) {
+                fclose($videoStream);
+            }
             @unlink($tempFile);
-            throw new \Exception('Failed to read video file');
-        }
-
-        $multipart[] = [
-            'name' => 'file',
-            'contents' => $videoContent,
-            'filename' => basename($media->url),
-        ];
-
-        $uploadResponse = Http::asMultipart()
-            ->timeout(600)
-            ->post($uploadUrl, $multipart);
-
-        if (is_resource($videoContent)) {
-            fclose($videoContent);
-        }
-        @unlink($tempFile);
-
-        if ($uploadResponse->failed()) {
-            Log::error('Pinterest video upload failed', [
-                'status' => $uploadResponse->status(),
-                'body' => $uploadResponse->body(),
-            ]);
-            throw new \Exception('Pinterest video upload failed');
         }
 
         // Step 3: Wait for processing