Deserialization of Untrusted Data in Apache Fory - CVE-2026-50076
Published: August 25, 2026
Vulnerability identifier: #VU145212
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-2026-50076
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass deserialization security checks and invoke classpath-present deserialization hooks.
The vulnerability exists due to deserialization of untrusted data in the Java replace-resolve path in ReplaceResolverSerializer when processing crafted Fory serialized data. A remote attacker can send crafted serialized data to bypass class registration, TypeChecker, and DisallowedList checks to bypass deserialization security checks and invoke classpath-present deserialization hooks.
The issue affects the Java/JVM implementation.
Affected software
Apache Fory
How to mitigate CVE-2026-50076
Install security update from vendor's website.
Apache Fory - update to 1.1.0