CVE-2026-91860Prototype Pollution in Vaadin Charts and Component Base via Unfiltered Deep Merge
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No exploitation reported and no EPSS estimate yet.
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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
- CVSS
- 6.3 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-1321
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Vaadin
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 30, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
vaadin vaadin vaadin:vaadin (from the name) | from 23.0.0 before 23.6.14; from 24.0.0 before 24.9.21; from 24.10.0 before 24.10.10; from 25.0.0 before 25.1.12; from 25.2.0 before 25.2.7 | CNA record |
vaadin vaadin-core vaadin:core (from the name) | from 24.7.0 before 24.9.21; from 24.10.0 before 24.10.10; from 25.0.0 before 25.1.12; from 25.2.0 before 25.2.7 | CNA record |
vaadin vaadin-charts-flow vaadin:charts_flow (from the name) | from 23.0.0 before 23.6.14; from 24.0.0 before 24.9.21; from 24.10.0 before 24.10.10; from 25.0.0 before 25.1.12; from 25.2.0 before 25.2.7 | CNA record |
vaadin @vaadin/charts vaadin:charts (from the name) | from 23.0.0 before 23.6.5; from 24.0.0 before 24.9.18; from 24.10.0 before 24.10.5; from 25.0.0 before 25.1.12; from 25.2.0 before 25.2.9 | CNA record |
vaadin @vaadin/component-base vaadin:component_base (from the name) | from 24.7.0 before 24.9.18; from 24.10.0 before 24.10.5; from 25.0.0 before 25.1.12; from 25.2.0 before 25.2.9 | CNA record |
References
- https://vaadin.com/security/cve-2026-91860
- https://github.com/vaadin/web-components/pull/12483
- https://github.com/vaadin/web-components/pull/12492
- https://github.com/vaadin/web-components/pull/12493
- https://github.com/vaadin/web-components/pull/12494
- https://github.com/vaadin/web-components/pull/12496
- https://github.com/vaadin/web-components/pull/12559
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.