CVE-2026-59889: 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 2.18.0 until 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1, UnwrappedPropertyHandler.processUnwrapped() replays buffered JSON for a @JsonUnwrapped property and calls prop.deserializeAndSet() without a prop.visibleInView(ctxt.getActiveView()) guard, allowing a property annotated with both @JsonView and @JsonUnwrapped to be written from attacker JSON under a less-privileged active view. This issue is fixed in versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1.

Affected products

• Fasterxml Jackson-Databind: from 2.18.0, before 2.18.9 (fixed in 2.18.9); from 2.21.0, before 2.21.5 (fixed in 2.21.5); from 2.22.0, before 2.22.1 (fixed in 2.22.1); from 3.0.0, before 3.1.5 (fixed in 3.1.5); from 3.2.0, before 3.2.1 (fixed in 3.2.1)

Published 2026-07-14. Last modified 2026-07-16.