Prototype Pollution in Vaadin Charts and Component Base via Unfiltered Deep Merge
Summary
| CVE | CVE-2026-91860 |
|---|---|
| State | PUBLISHED |
| Assigner | Vaadin |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-30 14:17:34 UTC |
| Updated | 2026-09-30 16:38:20 UTC |
| Description | 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 |
Risk And Classification
Primary CVSS: v4.0 6.3 MEDIUM from [email protected]
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Problem Types: CWE-1321 | CWE-1321 CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 6.3 | MEDIUM | 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/E:X/C... |
| 4.0 | CNA | CVSS | 6.3 | MEDIUM | 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 |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
PresentPrivileges Required
NoneUser Interaction
NoneConfidentiality
NoneIntegrity
LowAvailability
LowSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Vaadin | Vaadin | affected 23.0.0 23.6.14 maven | Not specified |
| CNA | Vaadin | Vaadin | affected 24.0.0 24.9.21 maven | Not specified |
| CNA | Vaadin | Vaadin | affected 24.10.0 24.10.10 maven | Not specified |
| CNA | Vaadin | Vaadin | affected 25.0.0 25.1.12 maven | Not specified |
| CNA | Vaadin | Vaadin | affected 25.2.0 25.2.7 maven | Not specified |
| CNA | Vaadin | Vaadin-core | affected 24.7.0 24.9.21 maven | Not specified |
| CNA | Vaadin | Vaadin-core | affected 24.10.0 24.10.10 maven | Not specified |
| CNA | Vaadin | Vaadin-core | affected 25.0.0 25.1.12 maven | Not specified |
| CNA | Vaadin | Vaadin-core | affected 25.2.0 25.2.7 maven | Not specified |
| CNA | Vaadin | Vaadin-charts-flow | affected 23.0.0 23.6.14 maven | Not specified |
| CNA | Vaadin | Vaadin-charts-flow | affected 24.0.0 24.9.21 maven | Not specified |
| CNA | Vaadin | Vaadin-charts-flow | affected 24.10.0 24.10.10 maven | Not specified |
| CNA | Vaadin | Vaadin-charts-flow | affected 25.0.0 25.1.12 maven | Not specified |
| CNA | Vaadin | Vaadin-charts-flow | affected 25.2.0 25.2.7 maven | Not specified |
| CNA | Vaadin | @vaadin/charts | affected 23.0.0 23.6.5 semver | Not specified |
| CNA | Vaadin | @vaadin/charts | affected 24.0.0 24.9.18 semver | Not specified |
| CNA | Vaadin | @vaadin/charts | affected 24.10.0 24.10.5 semver | Not specified |
| CNA | Vaadin | @vaadin/charts | affected 25.0.0 25.1.12 semver | Not specified |
| CNA | Vaadin | @vaadin/charts | affected 25.2.0 25.2.9 semver | Not specified |
| CNA | Vaadin | @vaadin/component-base | affected 24.7.0 24.9.18 semver | Not specified |
| CNA | Vaadin | @vaadin/component-base | affected 24.10.0 24.10.5 semver | Not specified |
| CNA | Vaadin | @vaadin/component-base | affected 25.0.0 25.1.12 semver | Not specified |
| CNA | Vaadin | @vaadin/component-base | affected 25.2.0 25.2.9 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/vaadin/web-components/pull/12559 | [email protected] | github.com | |
| github.com/vaadin/web-components/pull/12494 | [email protected] | github.com | |
| vaadin.com/security/cve-2026-91860 | [email protected] | vaadin.com | |
| github.com/vaadin/web-components/pull/12493 | [email protected] | github.com | |
| github.com/vaadin/web-components/pull/12496 | [email protected] | github.com | |
| github.com/vaadin/web-components/pull/12483 | [email protected] | github.com | |
| github.com/vaadin/web-components/pull/12492 | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Ridwan Arefin Islam, Madiba Security Lab, Concordia University (en)
Additional Advisory Data
Solutions
CNA: Users of affected versions should apply the following mitigation or upgrade.
There are currently no legacy QID mappings associated with this CVE.