diff --git a/bcbio/cwl/cwlutils.py b/bcbio/cwl/cwlutils.py
index a1319d375..be64ff013 100644
--- a/bcbio/cwl/cwlutils.py
+++ b/bcbio/cwl/cwlutils.py
@@ -92,7 +92,26 @@ def unpack_tarballs(xs, data, use_subdir=True):
             if not os.path.exists(out_dir):
                 with utils.chdir(tarball_dir):
                     with tarfile.open(xs, "r:gz") as tar:
-                        tar.extractall()
+                        def is_within_directory(directory, target):
+                            
+                            abs_directory = os.path.abspath(directory)
+                            abs_target = os.path.abspath(target)
+                        
+                            prefix = os.path.commonprefix([abs_directory, abs_target])
+                            
+                            return prefix == abs_directory
+                        
+                        def safe_extract(tar, path=".", members=None, *, numeric_owner=False):
+                        
+                            for member in tar.getmembers():
+                                member_path = os.path.join(path, member.name)
+                                if not is_within_directory(path, member_path):
+                                    raise Exception("Attempted Path Traversal in Tar File")
+                        
+                            tar.extractall(path, members, numeric_owner=numeric_owner) 
+                            
+                        
+                        safe_extract(tar)
             assert os.path.exists(out_dir), out_dir
             # Default to representing output directory
             xs = out_dir