CVE-2026-52439 is a critical vulnerability in xiandafu beetl version 3.20.2 that allows remote attackers to execute arbitrary code via the type.new function combined with the property reflection mechanism. This vulnerability is classified under CWE-917 (Improper Neutralization of Special Elements used in an Expression Language Statement), indicating that the issue arises from unsafe handling of reflective property access. The CVSS 3.1 base score of 9.8 reflects that the attack vector is network-based, requires no privileges or user interaction, and results in complete compromise of confidentiality, integrity, and availability. No vendor advisory or patch information is currently available, and no exploits have been reported in the wild.

Successful exploitation allows remote attackers to execute arbitrary code on affected systems without authentication, leading to full compromise of the system's confidentiality, integrity, and availability. This can result in unauthorized control over the affected application and potentially the underlying host.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider restricting network access to the affected service and monitoring for unusual activity related to the type.new function or property reflection usage. Avoid exposing the vulnerable version (3.20.2) to untrusted networks.