CVE-2026-44242— Micronaut Framework: Unbounded bundleCache in ResourceBundleMessageSource Allows Memory Exhaustion via Accept-Language Header
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| micronaut-projects | micronaut-core | < 4.10.22 | affected |
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I. Basic Information for CVE-2026-44242
Vulnerability Information
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Vulnerability Title
Micronaut Framework: Unbounded bundleCache in ResourceBundleMessageSource Allows Memory Exhaustion via Accept-Language Header
Source: NVD (National Vulnerability Database)
Vulnerability Description
Micronaut Framework is a JVM-based full stack Java framework designed for building modular, easily testable JVM applications. Prior to 4.10.22, the bundleCache is keyed by (Locale, baseName) where the locale originates from the HTTP Accept-Language header. In applications that explicitly register a ResourceBundleMessageSource bean and serve HTML error responses, an unauthenticated attacker can exhaust heap memory by sending requests with large numbers of unique Accept-Language values, each causing a new entry in the unbounded bundleCache. This vulnerability is fixed in 4.10.22.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Micronaut Framework 资源管理错误漏洞
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 4.10.22之前版本存在资源管理错误漏洞，该漏洞源于bundleCache使用无界缓存且键值源自HTTP Accept-Language标头，可能导致堆内存耗尽。
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 | < 4.10.22 | - |
II. Public POCs for CVE-2026-44242
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: micronaut-core
- CVE-2026-44241
Micronaut Framework: Unbounded formattersCache in TimeConver - CVE-2026-33013
Micronaut vulnerable to DoS via crafted form-urlencoded body - CVE-2026-33012
Micronaut Framework vulnerable to a Denial of Service in HTM - CVE-2024-23639
micronaut-core management endpoints vulnerable to drive-by - CVE-2022-21700
Memory leak in micronaut-core
Same vendor: micronaut-projects
- CVE-2026-44241
Micronaut Framework: Unbounded formattersCache in TimeConver - CVE-2026-33013
Micronaut vulnerable to DoS via crafted form-urlencoded body - CVE-2026-33012
Micronaut Framework vulnerable to a Denial of Service in HTM - CVE-2024-23639
micronaut-core management endpoints vulnerable to drive-by - CVE-2023-36820
micronaut security has invalid IdTokenClaimsValidator logic
Same weakness: CWE-400
- CVE-2026-42304
Twisted: Denial of Service (DoS) in twisted.names via Crafte - CVE-2026-44248
Netty: Resource exhaustion in MqttDecoder - CVE-2026-42587
Netty: HttpContentDecompressor maxAllocation bypass via Cont - CVE-2026-42583
Netty: Lz4FrameDecoder resource exhaustion - CVE-2026-44456
Hono: bodyLimit() can be bypassed for chunked / unknown-leng
V. Comments for CVE-2026-44242
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