CVE-2026-44241
Micronaut Framework is a JVM-based full stack Java framework designed for building modular, easily testable JVM applications. From 4.3.0 to
CVSS
7.5
Alto
EPSS
0.5%
p42
KEV
—
Exploit Today
13
0-100
Publicado: 12 may 2026 · Última mod.: 10 jul 2026 · CWE-400
Micronaut Framework is a JVM-based full stack Java framework designed for building modular, easily testable JVM applications. From 4.3.0 to before 4.10.22, 3.10.6, and 3.8.14, TimeConverterRegistrar caches DateTimeFormatter instances in an unbounded ConcurrentHashMap<String, DateTimeFormatter> whose key is derived from the @Format annotation pattern concatenated with the locale from the HTTP Accept-Language header. Because Locale.forLanguageTag() accepts arbitrary BCP 47 private-use extensions (en-x-a001, en-x-a002, …), an unauthenticated attacker can generate an unlimited number of unique cache keys by sending requests with novel locale tags, growing the cache until heap memory is exhausted and the JVM crashes. This vulnerability is fixed in 4.10.22, 3.10.6, and 3.8.14.
- github.comhttps://github.com/micronaut-projects/micronaut-core/commit/48f05ae8dc4157816fe0050c5cf730be7d44f8b3
- github.comhttps://github.com/micronaut-projects/micronaut-core/commit/c2048ab740c2efdfe227813f203176e0ef93f892
- github.comhttps://github.com/micronaut-projects/micronaut-core/commit/c6ca8782de7338732e887d090f38c9e941bcb284
- github.comhttps://github.com/micronaut-projects/micronaut-core/releases/tag/v3.10.6
- github.comhttps://github.com/micronaut-projects/micronaut-core/releases/tag/v3.8.14
- github.comhttps://github.com/micronaut-projects/micronaut-core/releases/tag/v4.10.22
- github.comhttps://github.com/micronaut-projects/micronaut-core/security/advisories/GHSA-8hjv-92q9-g4xj
- github.comhttps://github.com/micronaut-projects/micronaut-core/security/advisories/GHSA-8hjv-92q9-g4xj