diff --git a/kiwi/package_manager/apt.py b/kiwi/package_manager/apt.py
index 25e8fa1f..12f01f20 100644
--- a/kiwi/package_manager/apt.py
+++ b/kiwi/package_manager/apt.py
@@ -557,17 +557,19 @@ class PackageManagerApt(PackageManagerBase):
             script_post = f'{package_metadata_dir}/postinst'
             # 1. preinst
             if os.path.exists(script_pre):
+                Command.run(['chmod', '755', script_pre])
                 Command.run(
                     [
-                        'chroot', self.root_dir, 'bash',
+                        'chroot', self.root_dir,
                         f'{script_pre.replace(self.root_dir, "")}', 'install'
                     ], self.command_env
                 )
             # 2. postinst
             if os.path.exists(script_post):
+                Command.run(['chmod', '755', script_post])
                 Command.run(
                     [
-                        'chroot', self.root_dir, 'bash',
+                        'chroot', self.root_dir,
                         f'{script_post.replace(self.root_dir, "")}', 'configure'
                     ], self.command_env
                 )
diff --git a/test/unit/package_manager/apt_test.py b/test/unit/package_manager/apt_test.py
index 1f2bada4..28fd8286 100644
--- a/test/unit/package_manager/apt_test.py
+++ b/test/unit/package_manager/apt_test.py
@@ -182,13 +182,23 @@ class TestPackageManagerApt:
             ),
             call(
                 [
-                    'chroot', 'root-dir', 'bash',
+                    'chmod', '755', 'tempdir/base-passwd/preinst'
+                ]
+            ),
+            call(
+                [
+                    'chroot', 'root-dir',
                     'tempdir/base-passwd/preinst', 'install'
                 ], new_env
             ),
             call(
                 [
-                    'chroot', 'root-dir', 'bash',
+                    'chmod', '755', 'tempdir/base-passwd/postinst'
+                ]
+            ),
+            call(
+                [
+                    'chroot', 'root-dir',
                     'tempdir/base-passwd/postinst', 'configure'
                 ], new_env
             ),
@@ -197,13 +207,23 @@ class TestPackageManagerApt:
             ),
             call(
                 [
-                    'chroot', 'root-dir', 'bash',
+                    'chmod', '755', 'tempdir/base-passwd/preinst'
+                ]
+            ),
+            call(
+                [
+                    'chroot', 'root-dir',
                     'tempdir/base-passwd/preinst', 'install'
                 ], new_env
             ),
             call(
                 [
-                    'chroot', 'root-dir', 'bash',
+                    'chmod', '755', 'tempdir/base-passwd/postinst'
+                ]
+            ),
+            call(
+                [
+                    'chroot', 'root-dir',
                     'tempdir/base-passwd/postinst', 'configure'
                 ], new_env
             ),
@@ -212,13 +232,23 @@ class TestPackageManagerApt:
             ),
             call(
                 [
-                    'chroot', 'root-dir', 'bash',
+                    'chmod', '755', 'tempdir/vim/preinst'
+                ]
+            ),
+            call(
+                [
+                    'chroot', 'root-dir',
                     'tempdir/vim/preinst', 'install'
                 ], new_env
             ),
             call(
                 [
-                    'chroot', 'root-dir', 'bash',
+                    'chmod', '755', 'tempdir/vim/postinst'
+                ]
+            ),
+            call(
+                [
+                    'chroot', 'root-dir',
                     'tempdir/vim/postinst', 'configure'
                 ], new_env
             )