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CVE-2026-33013GHSA-43W5-MMXV-CPVH

Micronaut vulnerable to DoS via crafted form-urlencoded body binding with descending array indices

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 4.10.16, 3.10.5, 3.8.13
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: yes
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • micronaut-projects micronaut-core

    From 4.0.0-M1 · fixed in 4.10.16; fixed in 3.10.5

  • io.micronaut:micronaut-json-coreMaven

    From 4.0.0-M1 · fixed in 4.10.16

  • io.micronaut:micronaut-json-coreMaven

    From 3.9.0 · fixed in 3.10.5

  • io.micronaut:micronaut-json-coreMaven

    fixed in 3.8.13

References 5

GitHub · micronaut-projects/micronaut-core