Deserialization of untrusted data in python in pyfory versions 0.12.0 through 0.12.2, or the legacy pyfury versions from 0.1.0 through 0.10.3: allows arbitrary code execution. An application is vulnerable if it reads pyfory serialized data from untrusted sources. An attacker can craft a data stream that selects pickle-fallback serializer during deserialization, leading to the execution of `pickle.loads`, which is vulnerable to remote code execution. Users are recommended to upgrade to pyfory version 0.12.3 or later, which has removed pickle fallback serializer and thus fixes this issue.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| pyfory(PyPI) | 0.12.0 | 0.12.3 | N/A |
| pyfury(PyPI) | 0.1.0 | N/A | N/A |
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