Memory leak in micronaut-core
Impact
Sending an invalid Content Type header leads to memory leak in DefaultArgumentConversionContext as this type is erroneously used in static state.
Patches
The problem is patched in Micronaut 3.2.7 and above.
Workarounds
The default content type binder can be replaced in an existing Micronaut application to mitigate the issue:
package example;
import java.util.List;
import io.micronaut.context.annotation.Replaces;
import io.micronaut.core.convert.ConversionService;
import io.micronaut.http.MediaType;
import io.micronaut.http.bind.DefaultRequestBinderRegistry;
import io.micronaut.http.bind.binders.RequestArgumentBinder;
import jakarta.inject.Singleton;
@Singleton
@Replaces(DefaultRequestBinderRegistry.class)
class FixedRequestBinderRegistry extends DefaultRequestBinderRegistry {
public FixedRequestBinderRegistry(ConversionService conversionService,
List<RequestArgumentBinder> binders) {
super(conversionService, binders);
}
@Override
protected void registerDefaultConverters(ConversionService<?> conversionService) {
super.registerDefaultConverters(conversionService);
conversionService.addConverter(CharSequence.class, MediaType.class, charSequence -> {
try {
return MediaType.of(charSequence);
} catch (IllegalArgumentException e) {
return null;
}
});
}
}
References
Commit that introduced the vulnerability https://github.com/micronaut-projects/micronaut-core/commit/b8ec32c311689667c69ae7d9f9c3b3a8abc96fe3
For more information
If you have any questions or comments about this advisory:
- Open an issue in Micronaut Core
- Email us at info@micronaut.io
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | io.micronaut:micronaut-http | < 3.2.7 | 3.2.7 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L- Weakness (CWE)
CWE-400- Platform
- Java / Kotlin (Maven)
- Package
io.micronaut:micronaut-http- Disclosed
- 21.01.2022
- Updated
- 11.10.2026 11:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-2457-2263-mm9f - CC BY 4.0
Vulnerability history: io.micronaut:micronaut-http
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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