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# DataWeave 2.13.0 Release Notes

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

This MuleSoft programming language simplifies data transformation tasks and serves as Mule runtime’s
expression language for configuring components and connectors. Build powerful integration solutions
with intuitive scripting capabilities.

For more detail, see [DataWeave Language](https://docs.mulesoft.com/dataweave/latest/).

## October 6, 2026

DataWeave 2.13.0 is bundled with the Mule 4.13.0 release. For details about the Mule release, see
[Mule Runtime Engine 4.13.0 Release Notes](https://docs.mulesoft.com/release-notes/mule-runtime/mule-4.13.0-release-notes).

### What’s New

The 2.13.0 version of DataWeave introduces these new features and enhancements:

JSON Web Token Signing:

- DataWeave introduces the `dw::util::jwt::HMAC` module for creating signed JSON Web Tokens (JWTs)
  with the HS256, HS384, and HS512 algorithms. See
  [HMAC (dw::util::jwt::HMAC)](https://docs.mulesoft.com/dataweave/latest/dw-hmac).

- DataWeave introduces the `dw::util::jwt::RSA` module for creating signed JWTs with the RS256,
  RS384, and RS512 algorithms using unencrypted PKCS#1 or PKCS#8 PEM private keys. See
  [RSA (dw::util::jwt::RSA)](https://docs.mulesoft.com/dataweave/latest/dw-rsa).

### Compatibility

This table specifies which version of DataWeave is bundled with each Mule runtime engine release:

<table><colgroup><col> <col></colgroup><thead><tr><th>Mule Version</th><th>DataWeave Version</th></tr></thead><tbody><tr><td><p>4.13</p></td><td><p>2.13</p></td></tr><tr><td><p>4.12</p></td><td><p>2.12</p></td></tr><tr><td><p>4.11</p></td><td><p>2.11</p></td></tr><tr><td><p>4.10</p></td><td><p>2.10</p></td></tr><tr><td><p>4.9</p></td><td><p>2.9</p></td></tr><tr><td><p>4.8</p></td><td><p>2.8</p></td></tr><tr><td><p>4.7</p></td><td><p>2.7</p></td></tr><tr><td><p>4.6</p></td><td><p>2.6</p></td></tr><tr><td><p>4.5</p></td><td><p>2.5</p></td></tr><tr><td><p>4.4</p></td><td><p>2.4</p></td></tr><tr><td><p>4.3</p></td><td><p>2.3</p></td></tr><tr><td><p>4.2</p></td><td><p>2.2</p></td></tr><tr><td><p>4.1</p></td><td><p>2.1</p></td></tr><tr><td><p>3.9</p></td><td><p>1.2</p></td></tr><tr><td><p>3.8</p></td><td><p>1.1</p></td></tr><tr><td><p>3.7</p></td><td><p>1.0</p></td></tr></tbody></table>

### Fixed Issues

The release addresses these DataWeave issues and incorporates all patch updates from the 2.12.0
DataWeave release through October 2026:

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue Resolution</th><th>ID</th></tr></thead><tbody><tr><td><div><div><p>Memory usage for <code>text/plain</code> output is reduced.</p></div></div></td><td><div><div><p>W-20063270</p></div></div></td></tr><tr><td><div><div><p>Eagerly materialize executable Weave reader results.</p></div></div></td><td><div><div><p>W-23837275</p></div></div></td></tr><tr><td><div><div><p>Thread safety is improved when processing Java map values.</p></div></div></td><td><div><div><p>W-23661641</p></div></div></td></tr><tr><td><div><div><p>DataWeave tooling now reports design-time warnings when Java classes referenced in <code>application/java</code> schemas can’t be found or are inaccessible through JPMS.</p></div></div></td><td><div><div><p>W-22797049</p></div></div></td></tr><tr><td><div><div><p>DataWeave now filters Java classes in JPMS-unexported packages during Java module resolution, preventing runtime <code>IllegalAccessException</code> failures. This behavior is enabled by default on JDK 17 and later with DataWeave language version 2.13 and later. To keep the previous behavior, set <code>mule.dw.filter_jpms_inaccessible_modules=false</code>.</p></div></div></td><td><div><div><p>W-22779527</p></div></div></td></tr><tr><td><div><div><p>Cryptographic security warnings and errors now include call stacks.</p></div></div></td><td><div><div><p>W-22144340</p></div></div></td></tr></tbody></table>

### Upgrade

This version of DataWeave is bundled with Mule. DataWeave upgrades take place through Mule. See
[Mule Upgrades and Patch Updates](https://docs.mulesoft.com/release-notes/mule-runtime/mule-esb#mule-upgrades).

## See Also

- [Salesforce Help](https://help.salesforce.com)

- [MuleSoft Services](https://www.mulesoft.com/support-and-services)

- [Troubleshooting a Failing DataWeave Script](https://docs.mulesoft.com/dataweave/latest/dataweave-troubleshoot)

- [Known Issues](https://help.salesforce.com/s/issues)