Answer in brief
CVE-2026-44241 records a High severity vulnerability in Micronaut Framework: Unbounded formattersCache in TimeConverterRegistrar Allows Memory Exhaustion via Accept-Language Header. The current sources do not mark it as known exploited. The current feed maps micronaut-projects/micronaut-core (generic), io.micronaut:micronaut-context (maven), io.micronaut:micronaut-context (maven), io.micronaut:micronaut-context (maven). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-44241 records a High severity vulnerability in Micronaut Framework: Unbounded formattersCache in TimeConverterRegistrar Allows Memory Exhaustion via Accept-Language Header. The current sources do not mark it as known exploited. The current feed maps micronaut-projects/micronaut-core (generic), io.micronaut:micronaut-context (maven), io.micronaut:micronaut-context (maven), io.micronaut:micronaut-context (maven). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps micronaut-projects/micronaut-core (generic), io.micronaut:micronaut-context (maven), io.micronaut:micronaut-context (maven), io.micronaut:micronaut-context (maven). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| micronaut-projects/micronaut-coregeneric | >= 4.3.0, < 4.10.22 || >= 3.10.0, < 3.10.6 || < 3.8.14 | Not reported |
| io.micronaut:micronaut-contextmaven | >=4.3.0,<4.10.22 | 4.10.22 |
| io.micronaut:micronaut-contextmaven | >=3.10.0,<3.10.6 | 3.10.6 |
| io.micronaut:micronaut-contextmaven | <3.8.14 | 3.8.14 |
Published upstream
May 12, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 10, 2026
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.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps micronaut-projects/micronaut-core (generic), io.micronaut:micronaut-context (maven), io.micronaut:micronaut-context (maven), io.micronaut:micronaut-context (maven). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| micronaut-projects/micronaut-coregeneric | >= 4.3.0, < 4.10.22 || >= 3.10.0, < 3.10.6 || < 3.8.14 | Not reported |
| io.micronaut:micronaut-contextmaven | >=4.3.0,<4.10.22 | 4.10.22 |
| io.micronaut:micronaut-contextmaven | >=3.10.0,<3.10.6 | 3.10.6 |
| io.micronaut:micronaut-contextmaven | <3.8.14 | 3.8.14 |
Published upstream
May 12, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 10, 2026
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.
Quoted source text, attributed separately from HOL analysis.