typed_ast is a Python 3 package that provides a Python 2.7 and Python 3 parser similar to the standard ast library.
Affected versions of this package are vulnerable to Out-of-bounds Read via
ast_for_arguments out-of-bounds read. An attacker with the ability to cause a Python interpreter to parse Python source (but not necessarily execute it) may be able to crash the interpreter process. This could be a concern, for example, in a web-based service that parses (but does not execute) Python.
typed_ast to version 1.32 or higher.