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CVE-2026-33013 Micronaut

Affected softwareMicronaut
Severity8.2 High CVSS 4.0 2 scores
Fixed in4.10.16, 3.10.5, 3.8.13
WeaknessCWE-835
Published20 Mar 2026
Updated17 Jun 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.

Exploitation status

Proof of concept only

A proof of concept exists, but no reviewed exploit catalogue lists this CVE.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: poc CISA recorded that an exploit has been demonstrated. Automatable: yes, technical impact: partial.
  • Indexed PoC none indexed
  • EPSS 0.62% chance in 30 days

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

A public code fix exists: micronaut-projects/micronaut-core 1afe509.

  • Protection none
  • Action unverified
  • Review automated Upstream data
  • Record active
Decided by Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all
Finding This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.
Candidate fix https://github.com/micronaut-projects/micronaut-core/commit/1afe509677c51b320041b7a2c177366d4a4deb55 : a commit: the change itself

CVSS

8.2 HIGH v4.0 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 4.0 8.2 HIGH 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X security-advisories@github.com Secondary published
CVSS 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H NVD Primary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update April 2026 ↗ CPU 2026-Q2 Oracle Database Server / Clusterware (Micronaut) (19.3-19.30, 23.4.0-23.26.1)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Database Server Clusterware (Micronaut) 19.3-19.30, 23.4.0-23.26.1

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
io.micronaut:micronaut-json-core 4.0.0-M1 4.10.16 unbounded
io.micronaut:micronaut-json-core 3.9.0 3.10.5 unbounded
io.micronaut:micronaut-json-core 0 3.8.13 unbounded

Products and versions

2 products, 5 version entries
SourceVendorProductSchemeAffected versions
osv io.micronaut micronaut-json-core generic < 3.8.13 · ≥ 3.9.0 and < 3.10.5 · ≥ 4.0.0 and < 4.10.16
nvd objectcomputing micronaut generic < 3.10.5 · ≥ 4.0.0 and < 4.10.16

References

URLTags
https://github.com/micronaut-projects/micronaut-core/commit/1afe509677c51b320041b7a2c177366d4a4deb55 commit
https://github.com/micronaut-projects/micronaut-core/security/advisories/GHSA-43w5-mmxv-cpvh WEB
https://github.com/micronaut-projects/micronaut-core/pull/12410 WEB
https://github.com/micronaut-projects/micronaut-core PACKAGE
https://github.com/micronaut-projects/micronaut-core/releases/tag/v3.10.5 WEB
https://github.com/micronaut-projects/micronaut-core/releases/tag/v4.10.16 WEB

Timeline

Published2026-03-20By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.