CVE-2026-48207
published 2026-05-21CVE-2026-48207: Deserialization of untrusted data in Apache Fory PyFory. PyFory's ReduceSerializer could bypass documented DeserializationPolicy validation hooks during…
PriorityP262critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.57%
43.0th percentile
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
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | fory | >= 0.13.0 < 1.0.0 | 1.0.0 |
| apache_software_foundation | apache_fory | >= 0.13.0 < 1.0.0 | 1.0.0 |
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VulDB
Apache Fory 0.x unsafe deserialization (EUVD-2026-31292)
vuldb·2026-05-21·CVSS 9.8
CVE-2026-48207 [CRITICAL] Apache Fory 0.x unsafe deserialization (EUVD-2026-31292)
A vulnerability classified as critical has been found in Apache Fory 0.x. Affected by this vulnerability is the function unsafe. This manipulation causes deserialization.
This vulnerability is registered as CVE-2026-48207. Remote exploitation of the attack is possible. No exploit is available.
It is recommended to upgrade the affected component.
GHSA
Apache Fory PyFory Deserialization of Untrusted Data
ghsa·2026-05-21
CVE-2026-48207 [CRITICAL] CWE-502 Apache Fory PyFory Deserialization of Untrusted Data
Apache Fory PyFory Deserialization of Untrusted Data
Fory 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.
GHSA
GHSA-m5gw-83w2-7749: Deserialization of untrusted data in Apache Fory PyFory
ghsa_unreviewed·2026-05-21
CVE-2026-48207 [CRITICAL] CWE-502 GHSA-m5gw-83w2-7749: Deserialization of untrusted data in Apache Fory PyFory
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-05-21
Published