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Vulnerabilities CVE-2026-48207

CVE-2026-48207

None
Open
TLP:CLEAR

Apache Fory: PyFory ReduceSerializer Incomplete Policy Enforcement

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Description

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.

Details

EPSS Score
0.57%

44.5th percentile

Confidence
90%
Published
May 21, 2026
Last Modified
May 21, 2026
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