CVE-2026-54518: Fasterxml Jackson-Databind

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.21.0 until 2.21.4 and 3.1.4, UnwrappedPropertyHandler.processUnwrappedCreatorProperties() replays buffered JSON into creator parameters but never consults prop.visibleInView(activeView). The normal property-based creator path gates creator properties on the active view, but this unwrapped-creator replay path bypasses that check, so a constructor parameter annotated with both @JsonView(AdminView.class) and @JsonUnwrapped is populated from attacker JSON even when a more restrictive view is active. This vulnerability is fixed in 2.21.4 and 3.1.4.

Affected products

• Fasterxml Jackson-Databind: from 2.21.0, before 2.21.4 (fixed in 2.21.4); from 3.0.0, before 3.1.4 (fixed in 3.1.4)

Published 2026-06-23. Last modified 2026-06-27.