Medium 5.3Published Jun 23, 2026

CVE-2026-54515jackson-databind: Case-insensitive deserialization bypasses per-property @JsonIgnoreProperties

Updated under an hour ago (Oct 27, 2026, 2:10 AM ET)

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Every CVE for FasterXML jackson-databind

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-915
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jun 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

FasterXML jackson-databind fasterxml:jackson_databind (from the name)	from 2.8.0, < 2.18.9; from 2.19.0, < 2.21.5; from 3.1.0, < 3.1.4	CNA record
fasterxml jackson-databind fasterxml:jackson-databind	from 2.8.0 before 2.18.9; from 2.19.0 before 2.21.5; from 3.0.0 before 3.1.4; 2.22.0	NVD

References

References

https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-5jmj-h7xm-6q6v	x-refsource-confirm, third-party-advisory
https://github.com/FasterXML/jackson-databind/issues/5962	x-refsource-misc, issue-tracking
https://github.com/FasterXML/jackson-databind/issues/5964	x-refsource-misc, issue-tracking, patch
https://github.com/FasterXML/jackson-databind/commit/0e1b0b211f7a53baa62ba2f4c9bd006c7bf4d5fa	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.