diff --git a/src/Symfony/Component/HttpClient/Internal/CurlClientState.php b/src/Symfony/Component/HttpClient/Internal/CurlClientState.php
index 7d51c15cac5a7..80473fee07021 100644
--- a/src/Symfony/Component/HttpClient/Internal/CurlClientState.php
+++ b/src/Symfony/Component/HttpClient/Internal/CurlClientState.php
@@ -36,6 +36,7 @@ final class CurlClientState extends ClientState
     public $execCounter = \PHP_INT_MIN;
     /** @var LoggerInterface|null */
     public $logger;
+    public $performing = false;
 
     public static $curlVersion;
 
diff --git a/src/Symfony/Component/HttpClient/Response/CurlResponse.php b/src/Symfony/Component/HttpClient/Response/CurlResponse.php
index b03a49a946a85..7cfad581af4c4 100644
--- a/src/Symfony/Component/HttpClient/Response/CurlResponse.php
+++ b/src/Symfony/Component/HttpClient/Response/CurlResponse.php
@@ -32,7 +32,6 @@ final class CurlResponse implements ResponseInterface, StreamableInterface
     }
     use TransportResponseTrait;
 
-    private static $performing = false;
     private $multi;
     private $debugBuffer;
 
@@ -179,7 +178,7 @@ public function __construct(CurlClientState $multi, $ch, array $options = null,
             unset($multi->pauseExpiries[$id], $multi->openHandles[$id], $multi->handlesActivity[$id]);
             curl_setopt($ch, \CURLOPT_PRIVATE, '_0');
 
-            if (self::$performing) {
+            if ($multi->performing) {
                 return;
             }
 
@@ -237,13 +236,13 @@ public function getInfo(string $type = null)
      */
     public function getContent(bool $throw = true): string
     {
-        $performing = self::$performing;
-        self::$performing = $performing || '_0' === curl_getinfo($this->handle, \CURLINFO_PRIVATE);
+        $performing = $this->multi->performing;
+        $this->multi->performing = $performing || '_0' === curl_getinfo($this->handle, \CURLINFO_PRIVATE);
 
         try {
             return $this->doGetContent($throw);
         } finally {
-            self::$performing = $performing;
+            $this->multi->performing = $performing;
         }
     }
 
@@ -287,7 +286,7 @@ private static function schedule(self $response, array &$runningResponses): void
      */
     private static function perform(ClientState $multi, array &$responses = null): void
     {
-        if (self::$performing) {
+        if ($multi->performing) {
             if ($responses) {
                 $response = current($responses);
                 $multi->handlesActivity[(int) $response->handle][] = null;
@@ -298,7 +297,7 @@ private static function perform(ClientState $multi, array &$responses = null): v
         }
 
         try {
-            self::$performing = true;
+            $multi->performing = true;
             ++$multi->execCounter;
             $active = 0;
             while (\CURLM_CALL_MULTI_PERFORM === ($err = curl_multi_exec($multi->handle, $active))) {
@@ -335,7 +334,7 @@ private static function perform(ClientState $multi, array &$responses = null): v
                 $multi->handlesActivity[$id][] = \in_array($result, [\CURLE_OK, \CURLE_TOO_MANY_REDIRECTS], true) || '_0' === $waitFor || curl_getinfo($ch, \CURLINFO_SIZE_DOWNLOAD) === curl_getinfo($ch, \CURLINFO_CONTENT_LENGTH_DOWNLOAD) ? null : new TransportException(ucfirst(curl_error($ch) ?: curl_strerror($result)).sprintf(' for "%s".', curl_getinfo($ch, \CURLINFO_EFFECTIVE_URL)));
             }
         } finally {
-            self::$performing = false;
+            $multi->performing = false;
         }
     }