diff --git a/src/Symfony/Component/Config/Resource/GlobResource.php b/src/Symfony/Component/Config/Resource/GlobResource.php
index 3657f6dcb9500..57e528462cc90 100644
--- a/src/Symfony/Component/Config/Resource/GlobResource.php
+++ b/src/Symfony/Component/Config/Resource/GlobResource.php
@@ -111,7 +111,9 @@ public function getIterator()
         $prefix = str_replace('\\', '/', $this->prefix);
         $paths = null;
 
-        if (!str_starts_with($this->prefix, 'phar://') && !str_contains($this->pattern, '/**/')) {
+        if ('' === $this->pattern && is_file($prefix)) {
+            $paths = [$this->prefix];
+        } elseif (!str_starts_with($this->prefix, 'phar://') && !str_contains($this->pattern, '/**/')) {
             if ($this->globBrace || !str_contains($this->pattern, '{')) {
                 $paths = glob($this->prefix.$this->pattern, \GLOB_NOSORT | $this->globBrace);
             } elseif (!str_contains($this->pattern, '\\') || !preg_match('/\\\\[,{}]/', $this->pattern)) {
@@ -172,14 +174,21 @@ function (\SplFileInfo $file, $path) {
             throw new \LogicException(sprintf('Extended glob pattern "%s" cannot be used as the Finder component is not installed.', $this->pattern));
         }
 
+        if (is_file($prefix = $this->prefix)) {
+            $prefix = \dirname($prefix);
+            $pattern = basename($prefix).$this->pattern;
+        } else {
+            $pattern = $this->pattern;
+        }
+
         $finder = new Finder();
-        $regex = Glob::toRegex($this->pattern);
+        $regex = Glob::toRegex($pattern);
         if ($this->recursive) {
             $regex = substr_replace($regex, '(/|$)', -2, 1);
         }
 
-        $prefixLen = \strlen($this->prefix);
-        foreach ($finder->followLinks()->sortByName()->in($this->prefix) as $path => $info) {
+        $prefixLen = \strlen($prefix);
+        foreach ($finder->followLinks()->sortByName()->in($prefix) as $path => $info) {
             $normalizedPath = str_replace('\\', '/', $path);
             if (!preg_match($regex, substr($normalizedPath, $prefixLen)) || !$info->isFile()) {
                 continue;
diff --git a/src/Symfony/Component/Config/Tests/Fixtures/some.phar b/src/Symfony/Component/Config/Tests/Fixtures/some.phar
new file mode 100644
index 0000000000000..93d4e87c0b89b
Binary files /dev/null and b/src/Symfony/Component/Config/Tests/Fixtures/some.phar differ
diff --git a/src/Symfony/Component/Config/Tests/Resource/GlobResourceTest.php b/src/Symfony/Component/Config/Tests/Resource/GlobResourceTest.php
index fd317eb55c067..96953f3e32b8c 100644
--- a/src/Symfony/Component/Config/Tests/Resource/GlobResourceTest.php
+++ b/src/Symfony/Component/Config/Tests/Resource/GlobResourceTest.php
@@ -208,4 +208,29 @@ public function testSerializeUnserialize()
 
         $this->assertEquals($p->getValue($resource), $p->getValue($newResource));
     }
+
+    public function testPhar()
+    {
+        $s = \DIRECTORY_SEPARATOR;
+        $cwd = getcwd();
+        chdir(\dirname(__DIR__).'/Fixtures');
+        try {
+            $resource = new GlobResource('phar://some.phar', '*', true);
+            $files = array_keys(iterator_to_array($resource));
+            $this->assertSame(["phar://some.phar{$s}ProjectWithXsdExtensionInPhar.php", "phar://some.phar{$s}schema{$s}project-1.0.xsd"], $files);
+
+            $resource = new GlobResource("phar://some.phar{$s}ProjectWithXsdExtensionInPhar.php", '', true);
+            $files = array_keys(iterator_to_array($resource));
+            $this->assertSame(["phar://some.phar{$s}ProjectWithXsdExtensionInPhar.php"], $files);
+        } finally {
+            chdir($cwd);
+        }
+    }
+
+    public function testFilePrefix()
+    {
+        $resource = new GlobResource(__FILE__, '/**/', true);
+        $files = array_keys(iterator_to_array($resource));
+        $this->assertSame([], $files);
+    }
 }