CVE-2026-91860: Vaadin @vaadin/charts

Medium severity, CVSS 6.3. EPSS: 0.5% chance of exploitation in the next 30 days.

A prototype pollution vulnerability exists in the deep merge helpers of Vaadin Charts and Vaadin Component Base. Merging an object the application does not control into a chart configuration or into a component's i18n property writes onto Object.prototype, making the injected properties visible to every object in the running application. Users of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include: Product version Vaadin 23.0.0 - 23.6.13 Vaadin 24.0.0 - 24.9.20 Vaadin 24.10.0 - 24.10.9 Vaadin 25.0.0 - 25.1.11 Vaadin 25.2.0 - 25.2.6 Mitigation Upgrade to 23.6.14 Upgrade to 24.9.21 Upgrade to 24.10.10 Upgrade to 25.1.12 Upgrade to 25.2.7 or newer 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 23.0.0 - 23.6.13 >=23.6.14 com.vaadin:vaadin 24.0.0 - 24.9.20 >=24.9.21 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-core 24.7.0 - 24.9.20 >=24.9.21 com.vaadin:vaadin-core 24.10.0 - 24.10.9 >=24.10.10 com.vaadin:vaadin-core 25.0.0 - 25.1.11 >=25.1.12 com.vaadin:vaadin-core 25.2.0 - 25.2.6 >=25.2.7 com.vaadin:vaadin-charts-flow 23.0.0 - 23.6.13 >=23.6.14 com.vaadin:vaadin-charts-flow 24.0.0 - 24.9.20 >=24.9.21 com.vaadin:vaadin-charts-flow 24.10.0 - 24.10.9 >=24.10.10 com.vaadin:vaadin-charts-flow 25.0.0 - 25.1.11 >=25.1.12 com.vaadin:vaadin-charts-flow 25.2.0 - 25.2.6 >=25.2.7 npm packages npm package Vulnerable versions Fixed version @vaadin/charts 23.0.0 - 23.6.4 >=23.6.5 @vaadin/charts 24.0.0 - 24.9.17 >=24.9.18 @vaadin/charts 24.10.0 - 24.10.4 >=24.10.5 @vaadin/charts 25.0.0 - 25.1.11 >=25.1.12 @vaadin/charts 25.2.0 - 25.2.8 >=25.2.9 @vaadin/component-base 24.7.0 - 24.9.17 >=24.9.18 @vaadin/component-base 24.10.0 - 24.10.4 >=24.10.5 @vaadin/component-base 25.0.0 - 25.1.11 >=25.1.12 @vaadin/component-base 25.2.0 - 25.2.8 >=25.2.9

Affected products

• Vaadin @vaadin/charts: from 23.0.0, before 23.6.5 (fixed in 23.6.5); from 24.0.0, before 24.9.18 (fixed in 24.9.18); from 24.10.0, before 24.10.5 (fixed in 24.10.5); from 25.0.0, before 25.1.12 (fixed in 25.1.12); from 25.2.0, before 25.2.9 (fixed in 25.2.9)
• Vaadin @vaadin/component-Base: from 24.7.0, before 24.9.18 (fixed in 24.9.18); from 24.10.0, before 24.10.5 (fixed in 24.10.5); from 25.0.0, before 25.1.12 (fixed in 25.1.12); from 25.2.0, before 25.2.9 (fixed in 25.2.9)
• Vaadin Vaadin: from 23.0.0, before 23.6.14 (fixed in 23.6.14); from 24.0.0, before 24.9.21 (fixed in 24.9.21); from 24.10.0, before 24.10.10 (fixed in 24.10.10); from 25.0.0, before 25.1.12 (fixed in 25.1.12); from 25.2.0, before 25.2.7 (fixed in 25.2.7)
• Vaadin Vaadin-Charts-Flow: from 23.0.0, before 23.6.14 (fixed in 23.6.14); from 24.0.0, before 24.9.21 (fixed in 24.9.21); from 24.10.0, before 24.10.10 (fixed in 24.10.10); from 25.0.0, before 25.1.12 (fixed in 25.1.12); from 25.2.0, before 25.2.7 (fixed in 25.2.7)
• Vaadin Vaadin-Core: from 24.7.0, before 24.9.21 (fixed in 24.9.21); from 24.10.0, before 24.10.10 (fixed in 24.10.10); from 25.0.0, before 25.1.12 (fixed in 25.1.12); from 25.2.0, before 25.2.7 (fixed in 25.2.7)

Published 2026-09-30. Last modified 2026-09-30.