jackson-databind has case-insensitive deserialization bypasses per-property @JsonIgnoreProperties

TRUNG BÌNH 5.3CVE-2026-54515 · GHSA-5jmj-h7xm-6q6v · Công bố 23/06/2026 · cập nhật 25/10/2026

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
com.fasterxml.jackson.core:jackson-databind Maven	`≥ 2.19.0, < 2.21.5≥ 2.22.0, < 2.22.1≥ 2.8.0, < 2.18.9≥ 3.1.0, < 3.1.4`	`2.21.52.22.12.18.93.1.4`
tools.jackson.core:jackson-databind Maven	`≥ 3.1.0, < 3.1.4`	`3.1.4`
jackson-databind fasterxml	`= 2.22.0≥ 2.19.0, < 2.21.5≥ 2.8.0, < 2.18.9≥ 3.0.0, < 3.1.4`	`2.21.52.18.93.1.4`

Mô tả

Summary

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.

Impact

An application that both enables case-insensitive matching and relies on per-property @JsonIgnoreProperties to keep a field unwritable can have that field set from untrusted JSON (mass-assignment-style write).

Affected / Patched

Will be fixed in 2.18.9, 2.21.5, 2.22.1 and 3.1.4.

Severity / CWE

Maintainer: minor. Reporter: Moderate. CWE-915.

Upstream fix

FasterXML/jackson-databind#5962 (PR #5964, 0e1b0b2), milestone 3.1.4. Released 2026-06-04.

Mô tả của NVD

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.