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Fencer Intel
high 7.5

CVE-2026-33012 json

Micronaut Framework vulnerable to a Denial of Service in HTML error response caching

published 7mo ago modified last mo. also EUVD-2026-13551 , GHSA-2hcp-gjrf-7fhc

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

Summary

Micronaut Framework is a JVM-based full stack Java framework designed for building modular, easily testable JVM applications. Versions 4.7.0 through 4.10.16 used an unbounded ConcurrentHashMap cache with no eviction policy in its DefaultHtmlErrorResponseBodyProvider. If the application throws an exception whose message may be influenced by an attacker, (for example, including request query value parameters) it could be used by remote attackers to cause an unbounded heap growth and OutOfMemoryError, leading to DoS. This issue has been fixed in version 4.10.7.

Patch / fix

  • maven io.micronaut:micronaut-http-server 4.10.17
  • io.micronaut micronaut-http-server 4.10.17
  • objectcomputing micronaut 4.10.17

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-33012 updated cvss 6.5

Micronaut Framework: micronaut-core: Micronaut Framework: Denial of Service via unbounded cache in HTML error response handling

  • Red Hat build of Apache Camel for Spring Boot 4 jkube-kit-micronaut Red Hat Fuse 7 micronaut-aop, bolt-micronaut, micronaut-core, micronaut-http, micronaut-inject, micronaut-router, +15 more Red Hat JBoss Enterprise Application Platform 8 micronaut-aop, micronaut-core, micronaut-http, micronaut-retry, micronaut-inject, micronaut-router, +9 more Red Hat JBoss Enterprise Application Platform Expansion Pack micronaut-aop, micronaut-core, micronaut-http, micronaut-retry, micronaut-inject, micronaut-router, +9 more
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
7mo ago

Exploit prediction

0.58% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
maven io.micronaut:micronaut-http-server
>=4.7.0, <4.10.17
4.10.17

Affected products

  • micronaut-projects micronaut-core

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.