diff --git a/changelog/unreleased/block-overwriting-mountpoints.md b/changelog/unreleased/block-overwriting-mountpoints.md
index a21fe9c01f..2b3b9d1069 100644
--- a/changelog/unreleased/block-overwriting-mountpoints.md
+++ b/changelog/unreleased/block-overwriting-mountpoints.md
@@ -2,4 +2,5 @@ Bugfix: Block overwriting mountpoints
 
 This blocks overwriting mountpoints through the webdav COPY api. It is now returning a bad request when attempting to overwrite a mountpoint.
 
+https://github.com/cs3org/reva/pull/4786
 https://github.com/cs3org/reva/pull/4785
diff --git a/internal/http/services/owncloud/ocdav/copy.go b/internal/http/services/owncloud/ocdav/copy.go
index e19ebd01cb..07762196f8 100644
--- a/internal/http/services/owncloud/ocdav/copy.go
+++ b/internal/http/services/owncloud/ocdav/copy.go
@@ -692,10 +692,13 @@ func (s *svc) prepareCopy(ctx context.Context, w http.ResponseWriter, r *http.Re
 
 		// we must not allow to override mountpoints - so we check if we have access to the parent. If not this is a mountpoint
 		if destInShareJail {
-			log.Error().Msg("must not overwrite mount points")
-			w.WriteHeader(http.StatusBadRequest)
-			_, _ = w.Write([]byte("must not overwrite mount points"))
-			return nil
+			dir, file := filepath.Split(dstRef.GetPath())
+			if dir == "/" || dir == "" || file == "" {
+				log.Error().Msg("must not overwrite mount points")
+				w.WriteHeader(http.StatusBadRequest)
+				_, _ = w.Write([]byte("must not overwrite mount points"))
+				return nil
+			}
 		}
 
 		// delete existing tree when overwriting a directory or replacing a file with a directory