Bug 2449450 (CVE-2026-33012)

Summary: CVE-2026-33012 Micronaut Framework: micronaut-core: Micronaut Framework: Denial of Service via unbounded cache in HTML error response handling
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: asoldano, bbaranow, bmaxwell, bstansbe, dlofthou, fmariani, gmalinko, istudens, ivassile, iweiss, janstey, mosmerov, msvehla, nwallace, pberan, pdelbell, pesilva, pjindal, pmackay, rstancel, rstepani, smaestri, tcunning, thjenkin, vdosoudi, yfang
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Micronaut Framework. Remote attackers can exploit an unbounded cache in the DefaultHtmlErrorResponseBodyProvider component by influencing exception messages, such as through request query parameters. This can lead to uncontrolled memory growth and an OutOfMemoryError, resulting in a Denial of Service (DoS) for the application.
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Description OSIDB Bzimport 2026-03-20 06:02:43 UTC
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.