The vulnerability CVE-2026-27084 in ThemeREX Buisson is caused by unsafe deserialization of untrusted data, enabling object injection attacks. This can allow an attacker to execute arbitrary code or manipulate application logic remotely without authentication. The affected versions include all releases up to 1.1.11. The CVSS 3.1 base score is 9.8, reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and full impact on confidentiality, integrity, and availability. No official patch or fix has been documented in the provided data.

Successful exploitation of this vulnerability could lead to complete compromise of the affected system, including unauthorized code execution, data manipulation, and denial of service. The critical CVSS score indicates a severe risk to confidentiality, integrity, and availability. However, no known exploits have been reported in the wild so far.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider disabling or restricting use of the affected component and monitor for updates from ThemeREX. No vendor-provided mitigation or temporary fix information is currently available.