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 yet also creates the row and the cell.
Users of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include:
Product version Vaadin 23.1.0 - 23.6.13 Vaadin 24.0.0 - 24.9.21 Vaadin 24.10.0 - 24.10.9 Vaadin 25.0.0 - 25.1.11 Vaadin 25.2.0 - 25.2.6 Vaadin Framework 7 and 8 with the Spreadsheet add-on 2.0.0 - 3.1.0
Mitigation Upgrade to 23.6.14 Upgrade to 24.9.22 Upgrade to 24.10.10 Upgrade to 25.1.12 Upgrade to 25.2.7 or newer Upgrade the Spreadsheet add-on to 3.1.1
Please note that Vaadin versions 10-13 and 15-22 are no longer supported and you should update either to the latest 23, 24, 25 version.
Artifacts Maven coordinates Vulnerable versions Fixed version com.vaadin:vaadin 23.1.0 - 23.6.13 >=23.6.14 com.vaadin:vaadin 24.0.0 - 24.9.21 >=24.9.22 com.vaadin:vaadin 24.10.0 - 24.10.9 >=24.10.10 com.vaadin:vaadin 25.0.0 - 25.1.11 >=25.1.12 com.vaadin:vaadin 25.2.0 - 25.2.6 >=25.2.7 com.vaadin:vaadin-spreadsheet-flow 23.1.0 - 23.6.13 >=23.6.14 com.vaadin:vaadin-spreadsheet-flow 24.0.0 - 24.9.21 >=24.9.22 com.vaadin:vaadin-spreadsheet-flow 24.10.0 - 24.10.9 >=24.10.10 com.vaadin:vaadin-spreadsheet-flow 25.0.0 - 25.1.11 >=25.1.12 com.vaadin:vaadin-spreadsheet-flow 25.2.0 - 25.2.6 >=25.2.7 com.vaadin:vaadin-spreadsheet 2.0.0 - 3.1.0 >=3.1.1
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
com.vaadin:vaadinto a version that resolves this vulnerability.Fixed in 23.6.14 - Upgrade
Upgrade
com.vaadin:vaadinto a version that resolves this vulnerability.Fixed in 24.9.22 - Upgrade
Upgrade
com.vaadin:vaadinto a version that resolves this vulnerability.Fixed in 24.10.10 - Upgrade
Upgrade
com.vaadin:vaadinto a version that resolves this vulnerability.Fixed in 25.1.12 - Upgrade
Upgrade
com.vaadin:vaadinto a version that resolves this vulnerability.Fixed in 25.2.7 - Upgrade
Upgrade
com.vaadin:vaadin-spreadsheetto a version that resolves this vulnerability.Fixed in 3.1.1 - Upgrade
Upgrade
com.vaadin:vaadin-spreadsheet-flowto a version that resolves this vulnerability.Fixed in 23.6.14 - Upgrade
Upgrade
com.vaadin:vaadin-spreadsheet-flowto a version that resolves this vulnerability.Fixed in 24.9.22 - Upgrade
Upgrade
com.vaadin:vaadin-spreadsheet-flowto a version that resolves this vulnerability.Fixed in 24.10.10 - Upgrade
Upgrade
com.vaadin:vaadin-spreadsheet-flowto a version that resolves this vulnerability.Fixed in 25.1.12 - Upgrade
Upgrade
com.vaadin:vaadin-spreadsheet-flowto a version that resolves this vulnerability.Fixed in 25.2.7
Event History
Frequently Asked Questions
Who can exploit this issue?
An attacker must be an authenticated user of an application that renders a Vaadin Spreadsheet. Sheet protection and locked cells do not prevent that user from adding or replacing cell comments in affected versions.
What changes can an attacker make?
The attacker can add or replace comments on protected sheets, including comments on locked cells. Adding a comment to a cell that does not yet exist also creates the row and cell.
Which upgrades address the issue?
Upgrade Vaadin 23 to 23.6.14 or newer, 24.0–24.9 to 24.9.22 or newer, 24.10 to 24.10.10 or newer, 25.0–25.1 to 25.1.12 or newer, or 25.2 to 25.2.7 or newer. For Vaadin Framework 7 or 8 with the Spreadsheet add-on, upgrade the add-on to 3.1.1; versions 10–13 and 15–22 are unsupported and should be updated to a current 23, 24, or 25 release.