CVE-2026-48276

This flaw lets an attacker upload a file type that shouldn’t be accepted. Think of it like leaving a “package drop box” that accepts not only normal deliveries, but also contraband that can harm your building. In ColdFusion, that can potentially lead to running malicious code on your server.

This matters if you use or host Adobe ColdFusion and your version is 2025.9, 2023.20, or earlier. It’s especially relevant for sites where an attacker could reach a file-upload feature exposed to the network, since exploitation does not require user interaction. If your ColdFusion instance is not reachable from the internet and no attacker can access the relevant upload functionality, the risk is reduced.

This is an AMBER issue: the vulnerability can enable high-impact outcomes (including code execution) and is reachable over the network. However, the provided findings do not show confirmed KEV listing or a clear dated real-world exploitation claim, and there’s no public exploit code on record. Treat it as a priority to patch soon, especially if you have any internet-reachable file upload features.