MediumCVE-2026-54515

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

    Published Last modified Sources: BSI, Red Hat, CVE.org, Hersteller, OSV

    What is affected, what to do

    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.

    An exploit is publicly available. Update jackson-databind to version 2.18.9, Jackson to version 2.21.5, QRadar SIEM to version 7.6.0.3.

    Affected
    • FasterXML Jackson-databind gte 2.8.0, < 2.18.9..*

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    5.3

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: NVD, CVSS v3

    5.3

    CVSS v3

    Severity Medium on the scale from 0 to 10.

    Source: BSI, Red Hat, CVE.org, Hersteller, OSV

    0.4 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 37.2

    Show all metrics
    Severity
    Medium
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    57.50 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    PoC (publicly reported)
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    5.3 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    5.3
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    0.4 %
    Low — model estimates < 1% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    37.2
    High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-915

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    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.

    Source: BSI WID Portal, BSI CSAF, redhat_csaf, NVD (NIST), CVE.org (MITRE), GitHub Security Advisories, OSV (Open Source Vulnerabilities), cvelistv5

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    VendorProductAffected versionsFixed in
    FasterXMLjackson-databind
    • ≥ 2.8.0, < 2.18.9
    • —
    fasterxmljackson-databind
    • 2.22.0
    • 2.8.0 – < 2.18.9
    • 2.19.0 – < 2.21.5
    • 3.0.0 – < 3.1.4
    • —
    • 2.18.9
    • 2.21.5
    • 3.1.4
    FasterXMLJackson
    • < 2.21.5
    • < 2.18.8
    • < 2.18.9
    • < 2.14.0
    • < 2.21.4
    • < 3.1.4
    • 2.21.5
    • 2.18.8
    • 2.18.9
    • 2.14.0
    • 2.21.4
    • 3.1.4
    IBMQRadar SIEM
    • < 7.6.0.3
    • <7.5.0 UP16 IF01
    • <7.5.0 UP15 IF06
    • 7.6.0.3
    • —
    • —
    OracleCommerce
    • 11.4.0
    • —
    OracleConstruction and Engineering
    • 24.12.0-24.12.14
    • 21.12.0.0-21.12.21.8
    • 23.12.0-23.12.19
    • 22.12.0.0-22.12.21.2
    • 25.12.0-25.12.6
    • —
    • —
    • —
    • —
    • —
    OracleDatabase Server
    • 23.4.0-23.26.2
    • 19.3-19.30
    • 19.3-19.31
    • 23.4.0-23.26.1
    • 21.3-21.22
    • —
    • —
    • —
    • —
    • —
    OracleREST Data Services
    • 24.2.0-26.1.0
    • 24.2.0-26.2.2
    • 24.2.0-26.2.1
    • —
    • —
    • —
    OracleSiebel CRM
    • 17.0-26.7
    • 22.3-26.7
    • 23.6-26.7
    • 25.12-26.7
    • —
    • —
    • —
    • —
    RealObjectsPDFreactor
    • < 12.7.1
    • 12.7.1

    Weakness classes (CWE)

    • CWE-915Improperly Controlled Modification of Dynamically-Determined Object Attributes

      Base

      The product receives input from an upstream component that specifies multiple attributes, properties, or fields that are to be initialized or updated in an object, but it does not properly control which attributes can be modified.

      Entry at MITRE CWE-915

    Public exploit references

    Publicly reported proof-of-concepts, exploit modules and detection templates for this vulnerability. NEOSEC links to the original sources only and does not provide any exploit code.

    Public exploit references
    SourceReferenceMaturityPublished
    PoC-in-GitHub (nomi-sec)jackson-check (opens in a new tab)github.comPoC (publicly reported)reported, not verified

    References & sources

    • github.comFasterXML/jackson-databind/security/advisories/GHSA-5jmj-h7xm-6…web, x_refsource_CONFIRM
    • NVD (NIST)vuln/detail/CVE-2026-54515advisory
    • github.comFasterXML/jackson-databind/issues/5962web, x_refsource_MISC
    • github.comFasterXML/jackson-databind/issues/5964web, x_refsource_MISC
    • github.comFasterXML/jackson-databind/commit/0e1b0b211f7a53baa62ba2f4c9bd0…web, x_refsource_MISC
    • github.comFasterXML/jackson-databindpackage

    Reanalysis & status changes

    Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

    1. Initial Analysisnvd@nist.gov

      • CPE Configuration: after OR *cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:* versions from (including) 3.0.0 up to (excluding) 3.1.4 *cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:* versions from (including) 2.19.0 up to (excluding) 2.21.5 *cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:* versions from (including) 2.8.0 up to (excluding) 2.18.9 *cpe:2.3:a:fasterxml:jackson-databind:2.22.0:*:*:*:*:*:*:*
      • Reference Type: after GitHub, Inc.: https://github.com/FasterXML/jackson-databind/commit/0e1b0b211f7a53baa62ba2f4c9bd006c7bf4d5fa Types: Patch
      • Reference Type: after GitHub, Inc.: https://github.com/FasterXML/jackson-databind/issues/5962 Types: Issue Tracking
      • Reference Type: after GitHub, Inc.: https://github.com/FasterXML/jackson-databind/issues/5964 Types: Issue Tracking, Patch

    2. CVE Modified134c704f-9b21-4f2e-91b3-4a467353bcc0

      • SSVC: after {"id":"CVE-2026-54515","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"yes"},{"technical…

    3. New CVE Receivedsecurity-advisories@github.com

      • Affected: after jackson-databind
      • Description: after 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 V3.1: after AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
      • CWE: after CWE-915
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