GHSA-68xg-gqqm-vgj8

### Impact Prior to version 6.3.1, puma exhibited incorrect behavior when parsing chunked transfer encoding bodies and zero-length Content-Length headers in a way that allowed HTTP request smuggling.

The following vulnerabilities are addressed by this advisory:

* Incorrect parsing of trailing fields in chunked transfer encoding bodies * Parsing of blank/zero-length Content-Length headers

### Patches The vulnerability has been fixed in 6.3.1 and 5.6.7.

### Workarounds No known workarounds.

### References [HTTP Request Smuggling](https://portswigger.net/web-security/request-smuggling)

### For more information If you have any questions or comments about this advisory:

Open an issue in [Puma](https://github.com/puma/puma) See our [security policy](https://github.com/puma/puma/security/policy)