Answer in brief
CVE-2026-91860 records a Medium severity (CVSS 6.3) vulnerability in Prototype Pollution in Vaadin Charts and Component Base via Unfiltered Deep Merge. The current sources do not mark it as known exploited. The current feed maps vaadin/com.vaadin:vaadin (generic), vaadin/com.vaadin:vaadin-charts-flow (generic), vaadin/com.vaadin:vaadin-core (generic), vaadin/@vaadin/charts (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps vaadin/com.vaadin:vaadin (generic), vaadin/com.vaadin:vaadin-charts-flow (generic), vaadin/com.vaadin:vaadin-core (generic), vaadin/@vaadin/charts (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| vaadin/com.vaadin:vaadingeneric | >=23.0.0 <23.6.14 || >=24.0.0 <24.9.21 || >=24.10.0 <24.10.10 || >=25.0.0 <25.1.12 || >=25.2.0 <25.2.7 | 23.6.14, 24.9.21, 24.10.10, 25.1.12, 25.2.7 |
| vaadin/com.vaadin:vaadin-charts-flowgeneric | >=23.0.0 <23.6.14 || >=24.0.0 <24.9.21 || >=24.10.0 <24.10.10 || >=25.0.0 <25.1.12 || >=25.2.0 <25.2.7 | 23.6.14, 24.9.21, 24.10.10, 25.1.12, 25.2.7 |
| vaadin/com.vaadin:vaadin-coregeneric | >=24.7.0 <24.9.21 || >=24.10.0 <24.10.10 || >=25.0.0 <25.1.12 || >=25.2.0 <25.2.7 | 24.9.21, 24.10.10, 25.1.12, 25.2.7 |
| vaadin/@vaadin/chartsgeneric | >=23.0.0 <23.6.5 || >=24.0.0 <24.9.18 || >=24.10.0 <24.10.5 || >=25.0.0 <25.1.12 || >=25.2.0 <25.2.9 | 23.6.5, 24.9.18, 24.10.5, 25.1.12, 25.2.9 |
| vaadin/@vaadin/component-basegeneric | >=24.7.0 <24.9.18 || >=24.10.0 <24.10.5 || >=25.0.0 <25.1.12 || >=25.2.0 <25.2.9 | 24.9.18, 24.10.5, 25.1.12, 25.2.9 |
Published upstream
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 30, 2026
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
Quoted source text, attributed separately from HOL analysis.