CVE-2026-54515
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk27th percentile - higher than 27% of all known CVEs
Summary
In jackson-databind from version 2.8.0 to 2.18.9, 2.21.5, and 3.1.4, a vulnerability exists where per-property @JsonIgnoreProperties exclusions are applied by removing ignored properties from BeanPropertyMap, but subsequent case-insensitivity processing (ACCEPT_CASE_INSENSITIVE_PROPERTIES) rebuilds the map from the original unfiltered source, restoring the removed properties. The ignored property becomes writable again.
Risk Assessment
An attacker can bypass property exclusion mechanisms (e.g., @JsonIgnoreProperties) and access fields that should be blocked, potentially leading to unauthorized data reading or modification.
Recommendation
Immediately update jackson-databind to version 2.18.9, 2.21.5, or 3.1.4 (depending on the branch used).
Original NVD description (English source)
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.8.0 until 2.18.9, 2.21.5, and 3.1.4, in BeanDeserializerBase.createContextual(), per-property @JsonIgnoreProperties exclusions are applied by _handleByNameInclusion(), producing a contextual deserializer whose BeanPropertyMap has the ignored properties removed. The subsequent per-property case-insensitivity block (triggered by @JsonFormat(ACCEPT_CASE_INSENSITIVE_PROPERTIES)) rebuilds from this._beanProperties (the original, unfiltered map) instead of contextual._beanProperties, then overwrites the filtered map — restoring every property _handleByNameInclusion had just removed. The ignored property becomes writable again. This vulnerability is fixed in 2.18.9, 2.21.5, and 3.1.4.