Medium [CVE-2026-54517] Information disclosure via improper JsonView filter application

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, in BeanDeserializer._deserializeUsingPropertyBased, the active-view (@JsonView) filter was applied only to creator properties; the regular property-buffering branch performed no prop.visibleInView(activeView) check.

A change making SetterlessProperty.isMerging() return true routed setterless Collection/Map properties through this unguarded path, so a setterless collection annotated with a restricted @JsonView is populated from attacker JSON even when the active view excludes it. This vulnerability is fixed in 2.21.4 and 3.1.4.

A remote attacker can exploit this vulnerability due to an issue in how active-view (@JsonView) filters are applied. This can lead to information disclosure, allowing an attacker to access data that should otherwise be restricted.

Moderate: A flaw in jackson-databind allows for information disclosure and an access-control bypass. This occurs because the `@JsonView` filter, intended to restrict data visibility, is not correctly applied to setterless collection and map properties during deserialization.

An attacker could exploit this to populate view-restricted properties from untrusted JSON, potentially accessing sensitive data that should be excluded by the active view.