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Vulnerability · Published Mar 20, 2026 · Assigned by GitHub_M

CVE-2026-33012Micronaut Framework vulnerable to a Denial of Service in HTML error response caching

High 7.5

In plain English

A high-severity resource allocation without limits in micronaut-core from micronaut-projects. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 51.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Mavenio.micronaut:micronaut-http-server4.10.17GHSA-2hcp-gjrf-7fhc

Affected products (as reported)

VendorProductVersions
micronaut-projects micronaut-core >= 4.7.0, < 4.10.17

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References