jackson-databind: Case-insensitive deserialization bypasses per-property @JsonIgnoreProperties

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Summary

CVECVE-2026-54515
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-23 21:17:02 UTC
Updated2026-06-23 21:17:02 UTC
Descriptionjackson-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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Problem Types: CWE-915 | CWE-915 CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA FasterXML Jackson-databind affected >= 2.8.0, < 2.18.9 Not specified
CNA FasterXML Jackson-databind affected >= 2.19.0, < 2.21.5 Not specified
CNA FasterXML Jackson-databind affected >= 3.1.0, < 3.1.4 Not specified

References

ReferenceSourceLinkTags
github.com/FasterXML/jackson-databind/issues/5962 [email protected] github.com
github.com/FasterXML/jackson-databind/security/advisories/GHSA-5jmj-h7xm... [email protected] github.com
github.com/FasterXML/jackson-databind/issues/5964 [email protected] github.com
github.com/FasterXML/jackson-databind/commit/0e1b0b211f7a53baa62ba2f4c9b... [email protected] github.com
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