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CVE-2026-54513

8.1 · HIGH

jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor.

Published Jun 23, 2026CWE-184EPSS 1.23%

Overview

CVE-2026-54513 is a high-severity vulnerability. It was published on June 23, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/FasterXML/jackson-databind/commit/01d1692c8d0ed03e51a0e3c4f8a9e6908e4931e5GitHubgithub.com/FasterXML/jackson-databind/commit/24529da29fdf46ff94ca38de9ebf31cd188f5e8eGitHubgithub.com/FasterXML/jackson-databind/issues/5981GitHubgithub.com/FasterXML/jackson-databind/issues/5983GitHubgithub.com/FasterXML/jackson-databind/pull/5984GitHubgithub.com/FasterXML/jackson-databind/security/advisories/GHSA-rmj7-2vxq-3g9fRefaccess.redhat.com/errata/RHSA-2026:36839Refaccess.redhat.com/errata/RHSA-2026:40895Refaccess.redhat.com/errata/RHSA-2026:41951Refaccess.redhat.com/errata/RHSA-2026:43218

How CyberStrike helps

Frequently asked questions

What is CVE-2026-54513?

CVE-2026-54513 is a high-severity vulnerability. It was published on June 23, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-54513?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-54513?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-54513?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-54513 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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