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

Quick assessment

Affected
micronaut-projects micronaut-core
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Micronaut Framework是Micronaut基金会的一个基于 JVM 的现代全栈 Java 框架。 Micronaut Framework 4.7.0版本至4.10.16版本存在安全漏洞，该漏洞源于DefaultHtmlErrorResponseBodyProvider使用无限制的ConcurrentHashMap缓存，可能导致堆无限增长和拒绝服务。

CVSS 7.5 · High EPSS 0.75% · P54

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2026-33012

Vulnerability Information
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Vulnerability Title
Micronaut Framework vulnerable to a Denial of Service in HTML error response caching
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Micronaut Framework 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Micronaut Framework是Micronaut基金会的一个基于 JVM 的现代全栈 Java 框架。 Micronaut Framework 4.7.0版本至4.10.16版本存在安全漏洞，该漏洞源于DefaultHtmlErrorResponseBodyProvider使用无限制的ConcurrentHashMap缓存，可能导致堆无限增长和拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
micronaut-projects micronaut-core >= 4.7.0, < 4.10.17 -

II. Public POCs for CVE-2026-33012

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III. Intelligence Information for CVE-2026-33012

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Patches & Fixes for CVE-2026-33012 (1)

Vendor Advisories for CVE-2026-33012 (1)

Vendor Pages for CVE-2026-33012 (1)

IV. Related Vulnerabilities

Same product: micronaut-core
Same vendor: micronaut-projects
Same weakness: CWE-770

V. Comments for CVE-2026-33012

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