Improper access control in Apache Fory - CVE-2026-48207
Published: August 25, 2026
Vulnerability identifier: #VU145287
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-48207
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass deserialization policy restrictions.
The vulnerability exists due to improper access control in ReduceSerializer when deserializing attacker-controlled data during reduce-state restoration and global-name resolution. A remote attacker can supply crafted serialized data to bypass deserialization policy restrictions.
Only applications using PyFory Python-native mode with strict mode disabled and relying on DeserializationPolicy to restrict unsafe classes, functions, or module attributes are vulnerable.
Affected software
Apache Fory
How to mitigate CVE-2026-48207
Install security update from vendor's website.
Apache Fory - update to 1.0.0