Micronaut Framework is a JVM-based full stack Java framework designed for building modular, easily testable JVM applications. Versions prior to both 4.10.16 and 3.10.5 do not correctly handle descending array index order during form-urlencoded body binding in theJsonBeanPropertyBinder::expandArrayToThreshold, which allows remote attackers to cause a DoS (non-terminating loop, CPU exhaustion, and OutOfMemoryError) via crafted indexed form parameters (e.g., authors[1].name followed by authors[0].name). This issue has been fixed in versions 4.10.16 and 3.10.5.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
micronaut-projects micronaut-core affected
Version Status Constraints
>= 4.0.0-M1, < 4.10.16 affected
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< 3.10.5 affected
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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-43w5-mmxv-cpvh Micronaut vulnerable to DoS via crafted form-urlencoded body binding with descending array indices
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/micronaut-projects/micronaut-core/commit/1afe509677c51b320041b7a2c177366d4a4deb55 cve-icon cve-icon
https://github.com/micronaut-projects/micronaut-core/pull/12410 cve-icon cve-icon
https://github.com/micronaut-projects/micronaut-core/releases/tag/v3.10.5 cve-icon cve-icon
https://github.com/micronaut-projects/micronaut-core/releases/tag/v4.10.16 cve-icon cve-icon
https://github.com/micronaut-projects/micronaut-core/security/advisories/GHSA-43w5-mmxv-cpvh cve-icon cve-icon
History

Fri, 20 Mar 2026 05:15:00 +0000

Type Values Removed Values Added
Description Micronaut Framework is a JVM-based full stack Java framework designed for building modular, easily testable JVM applications. Versions prior to both 4.10.16 and 3.10.5 do not correctly handle descending array index order during form-urlencoded body binding in theJsonBeanPropertyBinder::expandArrayToThreshold, which allows remote attackers to cause a DoS (non-terminating loop, CPU exhaustion, and OutOfMemoryError) via crafted indexed form parameters (e.g., authors[1].name followed by authors[0].name). This issue has been fixed in versions 4.10.16 and 3.10.5.
Title Micronaut vulnerable to DoS via crafted form-urlencoded body binding with descending array indices
Weaknesses CWE-835
References
Metrics cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-20T04:47:42.768Z

Reserved: 2026-03-17T17:22:14.665Z

Link: CVE-2026-33013

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-03-20T05:16:15.380

Modified: 2026-03-20T05:16:15.380

Link: CVE-2026-33013

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses