Bref enable serverless PHP on AWS Lambda. When Bref is used with the Event-Driven Function runtime and the handler is a `RequestHandlerInterface`, then the Lambda event is converted to a PSR7 object.
During the conversion process, if the request is a MultiPart, each part is parsed and its content added in the `$files` or `$parsedBody` arrays. The conversion process produces a different output compared to the one of plain PHP when keys ending with and open square bracket ([) are used. Based on the application logic the difference in the body parsing might lead to vulnerabilities and/or undefined behaviors. This vulnerability is patched in 2.1.13.

GitHub, Inc. AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

GitHub, Inc. CWE-436

GitHub, Inc. https://github.com/brefphp/bref/security/advisories/GHSA-82vx-mm6r-gg8w [No types assigned]