CVE-2026-93547

The Vaadin Spreadsheet component (including the Spreadsheet add-on for Vaadin Framework 7 and 8) contains a missing authorization check that allows authenticated users to add or replace cell comments on sheets with enabled protection, including locked cells. The underlying cause is that the handl...

CVE-2026-93547 Missing Authorization Check in Vaadin Spreadsheet Allows Cell Comments to Be Written to Protected Sheets and Locked Cells

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...