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CVE Record

CVE-2019-14439: A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x before 2.9.9.2.

A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x before 2.9.9.2. This occurs when Default Typing is enabled (either globally or for a specific property) for an externally exposed JSON endpoint and the service has the logback jar in the classpath.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This issue affects older jackson-databind 2.x versions when risky polymorphic typing is enabled on an internet-facing JSON endpoint and logback is present. The bundle does not provide a CVSS score, but matching services should be treated as meaningful application risk because attacker-controlled JSON reaches deserialization logic.

Executive priority

Prioritize systems that expose JSON APIs to the internet and run older jackson-databind. Internal-only systems without Default Typing or logback appear lower priority based on the provided evidence.

Technical view

CVE-2019-14439 is a jackson-databind polymorphic typing issue before 2.9.9.2. Exposure depends on Default Typing, external JSON input, and logback in the classpath. Apache TomEE references updated jackson-databind to 2.9.9.3 to mitigate this CVE alongside related jackson-databind CVEs.

Likely exposure

Most exposed assets are Java services using jackson-databind 2.x before 2.9.9.2 with Default Typing enabled for externally reachable JSON parsing and logback available at runtime.

Exploitation context

The provided sources do not show active exploitation, and KEV is false. Risk is conditional: an attacker would need a reachable JSON endpoint processed by vulnerable jackson-databind configuration with the relevant classpath condition.

Researcher notes

The record lacks CVSS, CWE, and detailed exploit mechanics. Treat the CVE as configuration-dependent. Avoid assuming all jackson-databind users are vulnerable; validate version, Default Typing, external input path, and logback presence.

Mitigation direction

  • Upgrade jackson-databind to at least 2.9.9.2, or vendor-recommended fixed versions.
  • Review Apache TomEE guidance referencing jackson-databind 2.9.9.3 mitigation.
  • Disable unnecessary Default Typing on externally exposed JSON inputs.
  • Check Debian, Fedora, Red Hat, and application vendor advisories for packaged fixes.

Validation and detection

  • Inventory Java applications using jackson-databind 2.x before 2.9.9.2.
  • Confirm whether Default Typing is enabled globally or per property.
  • Identify externally exposed JSON endpoints using jackson-databind deserialization.
  • Check runtime classpaths for logback jars.
  • Verify patched package versions after dependency or vendor updates.
Prepared
Confidence
medium
Sources
8

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2019-14439 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
30Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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