diff --git a/changelog/unreleased/block-overwriting-mountpoints.md b/changelog/unreleased/block-overwriting-mountpoints.md
index 55b4e005b3..5e9d263b9b 100644
--- a/changelog/unreleased/block-overwriting-mountpoints.md
+++ b/changelog/unreleased/block-overwriting-mountpoints.md
@@ -2,6 +2,7 @@ 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/4802
 https://github.com/cs3org/reva/pull/4796
 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 cccc3c2f08..73e3129093 100644
--- a/internal/http/services/owncloud/ocdav/copy.go
+++ b/internal/http/services/owncloud/ocdav/copy.go
@@ -697,7 +697,14 @@ 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 {
-				dir, file := filepath.Split(dstRef.GetPath())
+				res, err := client.GetPath(ctx, &provider.GetPathRequest{ResourceId: dstStatRes.GetInfo().GetId()})
+				if err != nil || res.GetStatus().GetCode() != rpc.Code_CODE_OK {
+					log.Error().Err(err).Msg("error sending grpc get path request")
+					w.WriteHeader(http.StatusInternalServerError)
+					return nil
+				}
+
+				dir, file := filepath.Split(filepath.Clean(res.GetPath()))
 				if dir == "/" || dir == "" || file == "" {
 					log.Error().Msg("must not overwrite mount points")
 					w.WriteHeader(http.StatusBadRequest)