CVE-2026-48276 is a critical vulnerability in Adobe ColdFusion that allows unrestricted upload of files with dangerous types (CWE-434). Affected versions include 2023.0 through 2023.20 and all versions up to 2025.9. Exploitation does not require user interaction and can lead to arbitrary code execution in the context of the current user. The vulnerability has a CVSS 3.1 base score of 10.0, indicating critical impact with network attack vector, low attack complexity, no privileges required, no user interaction, and a changed scope affecting confidentiality, integrity, and availability. As of the published date, no official patch or remediation level has been disclosed by Adobe.

Successful exploitation can result in full compromise of the affected ColdFusion server, including arbitrary code execution with the privileges of the ColdFusion process user. This impacts confidentiality, integrity, and availability of the system. The vulnerability does not require user interaction and can be exploited remotely over the network, increasing the risk of widespread impact.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, organizations should consider restricting file upload functionality, implementing strict file type validation, and applying other compensating controls to limit exposure. Monitor Adobe's official security advisories for updates on patches or official mitigations.