diff --git a/controllers/storage.go b/controllers/storage.go
index fc90cb9d2..c5fd586f0 100644
--- a/controllers/storage.go
+++ b/controllers/storage.go
@@ -112,7 +112,7 @@ func (s Storage) SetHostname(URL string) string {
 // MkdirAll calls os.MkdirAll for the given v1beta1.Artifact base dir.
 func (s *Storage) MkdirAll(artifact sourcev1.Artifact) error {
 	dir := filepath.Dir(s.LocalPath(artifact))
-	return os.MkdirAll(dir, 0o770)
+	return os.MkdirAll(dir, 0o700)
 }
 
 // RemoveAll calls os.RemoveAll for the given v1beta1.Artifact base dir.
@@ -432,7 +432,7 @@ func (s *Storage) Archive(artifact *sourcev1.Artifact, dir string, filter Archiv
 		return err
 	}
 
-	if err := os.Chmod(tmpName, 0o640); err != nil {
+	if err := os.Chmod(tmpName, 0o600); err != nil {
 		return err
 	}
 
diff --git a/main.go b/main.go
index 75dd6d34f..e19f1ddb8 100644
--- a/main.go
+++ b/main.go
@@ -342,7 +342,7 @@ func mustInitStorage(path string, storageAdvAddr string, artifactRetentionTTL ti
 	if path == "" {
 		p, _ := os.Getwd()
 		path = filepath.Join(p, "bin")
-		os.MkdirAll(path, 0o770)
+		os.MkdirAll(path, 0o700)
 	}
 
 	storage, err := controllers.NewStorage(path, storageAdvAddr, artifactRetentionTTL, artifactRetentionRecords)
diff --git a/tests/fuzz/gitrepository_fuzzer.go b/tests/fuzz/gitrepository_fuzzer.go
index 20b0e3a45..0c495930a 100644
--- a/tests/fuzz/gitrepository_fuzzer.go
+++ b/tests/fuzz/gitrepository_fuzzer.go
@@ -120,7 +120,7 @@ func ensureDependencies() error {
 	// Output all embedded testdata files
 	embedDirs := []string{"testdata/crd", "testdata/certs"}
 	for _, dir := range embedDirs {
-		err := os.MkdirAll(dir, 0o750)
+		err := os.MkdirAll(dir, 0o700)
 		if err != nil {
 			return fmt.Errorf("mkdir %s: %v", dir, err)
 		}
@@ -139,7 +139,7 @@ func ensureDependencies() error {
 				return fmt.Errorf("reading embedded file %s: %v", fileName, err)
 			}
 
-			os.WriteFile(fileName, data, 0o640)
+			os.WriteFile(fileName, data, 0o600)
 			if err != nil {
 				return fmt.Errorf("writing %s: %v", fileName, err)
 			}
@@ -494,7 +494,7 @@ func createRandomFiles(f *fuzz.ConsumeFuzzer, fs billy.Filesystem, wt *git.Workt
 			return errors.New("Dir contains '..'")
 		}
 
-		err = fs.MkdirAll(dirPath, 0o770)
+		err = fs.MkdirAll(dirPath, 0o700)
 		if err != nil {
 			return errors.New("Could not create the subDir")
 		}