critical9.8
CVE-2026-48207
Deserialization of untrusted data in Apache Fory PyFory.
Impact
Deserialization of untrusted data in Apache Fory PyFory. PyFory's ReduceSerializer could bypass documented DeserializationPolicy validation hooks during reduce-state restoration and global-name resolution. An application is vulnerable if it deserializes attacker-controlled data using PyFory Python-native mode with strict mode disabled and relies on DeserializationPolicy to restrict unsafe classes, functions, or module attributes. This issue affects Apache Fory: from before 1.0.0. Mitigation: Users of Apache Fory are recommended to upgrade to version 1.0.0 or later, which enforces DeserializationPolicy validation for the affected ReduceSerializer paths and thus fixes this issue.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | pyfory | >= 0.13.0, < 1.0.0 | 1.0.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Apache | Fory | from 0.13.0 before 1.0.0 |