# CVE-2026-33013

## Summary

- **CVE ID:** CVE-2026-33013
- **Severity:** HIGH
- **CVSS Score:** 8.2 (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)
- **CWE:** CWE-835
- **Published:** Mar 20, 2026
- **Last Modified:** Mar 25, 2026

## 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.

## Affected Products

- micronaut-projects — micronaut-core (>= 4.0.0-M1, < 4.10.16)
- micronaut-projects — micronaut-core (< 3.10.5)

## References

- [CNA](https://github.com/micronaut-projects/micronaut-core/security/advisories/GHSA-43w5-mmxv-cpvh)
- [CNA](https://github.com/micronaut-projects/micronaut-core/pull/12410)
- [CNA](https://github.com/micronaut-projects/micronaut-core/commit/1afe509677c51b320041b7a2c177366d4a4deb55)
- [CNA](https://github.com/micronaut-projects/micronaut-core/releases/tag/v3.10.5)
- [CNA](https://github.com/micronaut-projects/micronaut-core/releases/tag/v4.10.16)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.60%
- **EPSS Percentile:** 46.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._