EUVD-2026-89952

A missing authorization check in the Vaadin Spreadsheet component allows an authenticated user of an application that renders a spreadsheet to add or replace cell comments on a sheet that has protection enabled, including on cells that are locked. Writing a comment to a cell that does not exist y...

Missing sheet protection check when updating cell comments

The handler that updates a cell comment in the Vaadin Spreadsheet component did not re-check the sheet protection state, so a user of an application that renders a spreadsheet could add or replace comments on a protected sheet and on locked cells, and create empty cells in the process. See CWE-28...