CVE-2026-48207
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk44th percentile - higher than 44% of all known CVEs
Summary
Apache Fory PyFory before version 1.0.0 has a deserialization vulnerability in ReduceSerializer that can bypass DeserializationPolicy validation hooks during reduce-state restoration and global-name resolution. An application is vulnerable if it deserializes attacker-controlled data in Python-native mode with strict mode disabled.
Risk Assessment
An attacker can inject malicious objects, potentially leading to remote code execution or other unauthorized actions within the application.
Recommendation
Upgrade Apache Fory to version 1.0.0 or later, which enforces DeserializationPolicy validation for the affected ReduceSerializer paths.
Original NVD description (English source)
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.