REDHAT-BUG-2492010: High severity fasterxml jackson-databind vulnerability

Published Jun 23, 2026
·
Updated

jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, BasicPolymorphicTypeValidator.Builder.allowIfSubTypeIsArray() allowlists any array type based only on clazz.isArray(), without validating the array's component (element) type against the configured allowlist. A PTV built with allowIfSubTypeIsArray() plus an explicit concrete-type allowlist therefore still permits EvilType[] even though EvilType is not allowlisted. When Jackson deserializes the elements and no per-element type IDs are present, it instantiates the component type directly with no further PTV check, bypassing the allowlist. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.

Affected Software

1 affected component
fasterxml jackson-databind>2.10.0<=2.18.8, >2.10.0<=2.21.4, >2.10.0<=3.1.4

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade jackson-databind to a version that resolves this vulnerability.

    Fixed in 2.18.8
  2. Upgrade

    Upgrade jackson-databind to a version that resolves this vulnerability.

    Fixed in 2.21.4
  3. Upgrade

    Upgrade jackson-databind to a version that resolves this vulnerability.

    Fixed in 3.1.4

Event History

Jun 23, 2026
Data Sourced
via Red Hat·10:01 PM
DescriptionSeverityAffected Software
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Frequently Asked Questions

1

What is the severity of REDHAT-BUG-2492010?

The severity of REDHAT-BUG-2492010 is classified as high with a score of 7.

2

How do I fix REDHAT-BUG-2492010?

To fix REDHAT-BUG-2492010, upgrade jackson-databind to versions 2.18.9 or later, or to 2.21.5 or later, or to 3.1.5 or later.

3

What is the main vulnerability in REDHAT-BUG-2492010?

The vulnerability in REDHAT-BUG-2492010 allows the BasicPolymorphicTypeValidator.Builder.allowIfSubTypeIsArray() method to inadvertently allow any array type without proper validation.

4

Which versions of jackson-databind are affected by REDHAT-BUG-2492010?

Versions of jackson-databind affected by REDHAT-BUG-2492010 include 2.10.0 to 2.18.8, 2.21.4, and 3.1.4.

5

What software is impacted by REDHAT-BUG-2492010?

The software impacted by REDHAT-BUG-2492010 is FasterXML jackson-databind.

Company

Resources

Contact

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REDHAT-BUG-2492010 - High severity fasterxml jackson-databind vulnerability - SecAlerts