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CVE record · CVE-2026-91860

Prototype Pollution in Vaadin Charts and Component Base via Unfiltered Deep Merge

CVSS 6.3 MediumEPSS 0.0047 · 40th percentile

Published by the CVE Program (CNA: Vaadin) at 30 Sept 2026, 13:13 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
vaadin vaadin Package name: com.vaadin:vaadin https://repo.maven.apache.org/maven2
  • affected 23.0.0 to before 23.6.14 maven
  • affected 24.0.0 to before 24.9.21 maven
  • affected 24.10.0 to before 24.10.10 maven
  • affected 25.0.0 to before 25.1.12 maven
  • affected 25.2.0 to before 25.2.7 maven
Other versions: unaffected
vaadin vaadin-core Package name: com.vaadin:vaadin-core https://repo.maven.apache.org/maven2
  • affected 24.7.0 to before 24.9.21 maven
  • affected 24.10.0 to before 24.10.10 maven
  • affected 25.0.0 to before 25.1.12 maven
  • affected 25.2.0 to before 25.2.7 maven
Other versions: unaffected
vaadin vaadin-charts-flow Package name: com.vaadin:vaadin-charts-flow https://repo.maven.apache.org/maven2
  • affected 23.0.0 to before 23.6.14 maven
  • affected 24.0.0 to before 24.9.21 maven
  • affected 24.10.0 to before 24.10.10 maven
  • affected 25.0.0 to before 25.1.12 maven
  • affected 25.2.0 to before 25.2.7 maven
Other versions: unaffected
vaadin @vaadin/charts Package name: @vaadin/charts https://registry.npmjs.org
  • affected 23.0.0 to before 23.6.5 semver
  • affected 24.0.0 to before 24.9.18 semver
  • affected 24.10.0 to before 24.10.5 semver
  • affected 25.0.0 to before 25.1.12 semver
  • affected 25.2.0 to before 25.2.9 semver
Other versions: unaffected
vaadin @vaadin/component-base Package name: @vaadin/component-base https://registry.npmjs.org
  • affected 24.7.0 to before 24.9.18 semver
  • affected 24.10.0 to before 24.10.5 semver
  • affected 25.0.0 to before 25.1.12 semver
  • affected 25.2.0 to before 25.2.9 semver
Other versions: unaffected
Identifiers
CVE-2026-91860
CNA
Vaadin
Weakness (CWE)
CWE-1321
Tags
Published
30 Sept 2026
Updated
30 Sept 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.3 Medium 4.0 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 CNA (Vaadin)
  • CISA KEV Not listed.
  • EPSS 0.0047, the 40th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 30 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.