# Denial of service due to reference expansion in versions earlier than 4.0

Source: https://junglewise.ai/threats/denial-of-service-due-to-reference-expansion-in-versions-earlier-than-4-b072a916  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2020-07-07  
License: CC BY 4.0 with a link back

Severity: info · Published 2020-07-07

Denial of service due to reference expansion in versions earlier than 4.0

Technologies: [com.upokecenter:cbor (Maven)](https://junglewise.ai/threats/technologies/com-upokecenter-cbor). Vendors: [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Informational severity, published 7 July 2020.

**Which products and versions are affected?** com.upokecenter:cbor (Maven) ECOSYSTEM:introduced=0,fixed=4.0.0.

**Is there a fix for This vulnerability?** Yes. com.upokecenter:cbor (Maven): upgrade to 4.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run com.upokecenter:cbor (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- com.upokecenter:cbor (Maven): upgrade to 4.0.0 or later

  ```sh
  # set com.upokecenter:cbor to 4.0.0 in your pom.xml or build.gradle
  ```


## Affected products

- com.upokecenter:cbor (Maven) ECOSYSTEM:introduced=0,fixed=4.0.0

## Related threats

- [Duplicate Advisory: Inefficient Algorithmic Complexity in com.upokecenter:cbor](https://junglewise.ai/threats/duplicate-advisory-inefficient-algorithmic-complexity-in-com-0a57831a)
- [Denial of service in CBOR library](https://junglewise.ai/threats/cve-2024-23684-denial-of-service-in-cbor-library)