Affected: Maven: com.amazon.ion:ion-java, Maven: software.amazon.ion:ion-java

### Impact

A potential denial-of-service issue exists in `ion-java` for applications that use `ion-java` to:

* Deserialize Ion text encoded data, or * Deserialize Ion text or binary encoded data into the `IonValue` model and then invoke certain `IonValue` methods on that in-memory representation.

An actor could craft Ion data that, when loaded by the affected application and/or processed using the `IonValue` model, results in a `StackOverflowError` originating from the `ion-java` library.

Impacted versions: <1.10.5

### Patches

The patch is included in `ion-java` >= 1.10.5.

### Workarounds

Do not load data which originated from an untrusted source or that could have been tampered with. **Only load data you trust.**

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If you have any questions or comments about this advisory, we ask that you contact AWS/Amazon Security via our vulnerability reporting page [1] or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue.

[1] https://aws.amazon.com/security/vulnerability-reporting