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CVE-2026-48207

⛔ critical
🔍 Scan for this CVE
Summary

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: U

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.

CVSS Score
9.8
Critical
EPSS Score
0.6
Exploit Probability
Published Date
2026-05-21
First Seen: 2026-05-22
📊 Relative Risk Intelligence

This CVE is Very High Risk - more severe than 90.5% of all 355,915 vulnerabilities in our database.

#33,752
Top 10% most severe
Severity Percentile
🎯 CISA SSVC Assessment Updated: May 21, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
YES
Can be exploited automatically
💥 Technical Impact
Total
Complete system compromise possible
🏆 Discovered By
Lide Wen (reporter)
SSVC data provided by CISA
Last Modified 2026-07-23
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE IDs (Weakness Types)
CWE-502

📦 Affected Products 1

Vendor Product Status Affected Versions
apache fory Affected
> 0.13.0 < 1.0.0

🔗 References 2

https://fory.apache.org/security/#cve-2026-48207-pyf...
Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/05/2...
Mailing List Third Party Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-71558 ⛔ critical 9.8 0.7 Heap type confusion vulnerability in Apache Fory C++ deserialization. This issue affects Apache Fory C++ versions from ... 2026-08-07
CVE-2026-71559 ⚠️ high 7.5 0.6 Deserialization of Untrusted Data vulnerability in the Go implementation of Apache Fory allows an attacker to cause a de... 2026-08-07
CVE-2026-71560 ⛔ critical 9.1 0.6 Out-of-bounds Read vulnerability in Apache Fory C++ deserialization. This issue affects Apache Fory C++ versions from 0... 2026-08-07
CVE-2026-64608 ⛔ critical 9.8 0.5 Heap type confusion and out-of-bounds read/write in the Apache Fory C++ implementation. When deserializing data in compa... 2026-07-21
CVE-2026-64609 ⛔ critical 9.1 0.5 Out-of-bounds read via sun.misc.Unsafe in Apache Fory. When out-of-band zero-copy deserialization is used, readAlignedVa... 2026-07-21
CVE-2026-64606 ⛔ critical 9.8 0.6 Deserialization of untrusted data vulnerability that may allow class-registration checks to be bypassed during Java lamb... 2026-07-21
These CVEs affect the same products