CVE-2026-48281: Adobe ColdFusion RCE Vulnerability

CVE-2026-48281 Overview

CVE-2026-48281 is an improper input validation vulnerability [CWE-20] affecting Adobe ColdFusion versions 2025.9, 2023.20, and earlier. The flaw allows attackers to achieve arbitrary code execution in the context of the current user without any user interaction. The vulnerability is network-exploitable with low attack complexity and requires no authentication. Because the CVSS scope is changed, successful exploitation can affect resources beyond the vulnerable ColdFusion component itself. Adobe published the security advisory APSB26-68 addressing this issue.

Critical Impact
Unauthenticated remote attackers can execute arbitrary code on affected ColdFusion servers, enabling full application server compromise and potential lateral movement into connected data stores and enterprise systems.

Affected Products

Adobe ColdFusion 2025 (base release through Update 9)
Adobe ColdFusion 2023 (base release through Update 20)
All earlier ColdFusion releases per the Adobe advisory

Discovery Timeline

2026-06-30 - CVE-2026-48281 published to NVD
2026-07-01 - Last updated in NVD database

Technical Details for CVE-2026-48281

Vulnerability Analysis

CVE-2026-48281 is classified as an Improper Input Validation weakness under CWE-20. ColdFusion fails to properly validate attacker-supplied input before it is processed by server-side logic. The insufficient validation permits a remote actor to influence program flow in a way that leads to arbitrary code execution in the context of the running ColdFusion process. The changed CVSS scope indicates that a successful exploit can pivot beyond the ColdFusion runtime into adjacent components such as the underlying operating system, connected databases, or downstream services. The EPSS score of 0.855% at the time of publication reflects moderate near-term exploitation likelihood, but ColdFusion has a documented history of active exploitation once technical details become public.

Root Cause

The root cause is missing or insufficient input validation on request data handled by the ColdFusion application server. When untrusted input reaches a sensitive processing path without sanitization or type enforcement, it can be interpreted as code or as a directive that alters server behavior. Adobe's advisory APSB26-68 documents this as the underlying weakness but does not disclose the specific component to reduce risk during patch rollout.

Attack Vector

Exploitation occurs over the network against exposed ColdFusion endpoints. The attacker sends a crafted HTTP request to a vulnerable ColdFusion service. No authentication or user interaction is required. Because ColdFusion servers commonly front internet-facing web applications, exposed instances are directly reachable from untrusted networks. Refer to the Adobe ColdFusion Security Advisory APSB26-68 for the vendor's technical details.

Detection Methods for CVE-2026-48281

Indicators of Compromise

Unexpected child processes spawned by the ColdFusion Java process (coldfusion.exe, jrun.exe, or java running under the ColdFusion service account), particularly shells such as cmd.exe, powershell.exe, or /bin/sh.
New or modified .cfm, .cfc, or .jsp files under ColdFusion web roots, indicating potential webshell deployment.
Outbound network connections from the ColdFusion server to unfamiliar hosts immediately following anomalous HTTP POST traffic.
HTTP requests to ColdFusion administrator paths (/CFIDE/administrator/, /CFIDE/adminapi/) from external IP addresses.

Detection Strategies

Inspect ColdFusion access logs for unusual request patterns targeting administrative endpoints or containing encoded payloads.
Correlate web server request logs with process creation telemetry to identify request-to-shell execution chains.
Baseline expected ColdFusion outbound traffic and alert on deviations, such as connections to raw IPs or non-standard ports.
Monitor filesystem writes under ColdFusion web-accessible directories for file types that should not be created at runtime.

Monitoring Recommendations

Enable verbose HTTP logging on ColdFusion and forward logs to a centralized analytics platform for retention and querying.
Track integrity of ColdFusion installation directories using file integrity monitoring on cfusion/wwwroot, cfusion/lib, and configuration paths.
Alert on any interactive shell process whose parent is the ColdFusion service, which is a high-fidelity indicator of exploitation.

How to Mitigate CVE-2026-48281

Immediate Actions Required

Apply the security update referenced in Adobe advisory APSB26-68 to all ColdFusion 2025 and 2023 installations immediately.
Inventory all ColdFusion instances, including development and staging servers, and confirm patch status for each.
Restrict network exposure of ColdFusion administrator interfaces to trusted management networks only.
Review web server and ColdFusion logs retroactively for signs of exploitation prior to patching.

Patch Information

Adobe has released fixed builds addressing CVE-2026-48281 for ColdFusion 2025 and ColdFusion 2023. Administrators should install the updates documented in the Adobe ColdFusion Security Advisory APSB26-68 and restart the ColdFusion services after installation. Verify the running build number in the ColdFusion Administrator after patching.

Workarounds

Place a web application firewall in front of ColdFusion and enforce strict request validation rules on all endpoints.
Run the ColdFusion service under a least-privilege account that cannot execute shells or write outside required directories.
Block direct internet access to the ColdFusion Administrator and internal APIs at the network perimeter until patching is complete.
Disable unused ColdFusion features and components to reduce the exposed attack surface.

bash

# Configuration example: restrict access to the ColdFusion Administrator via reverse proxy
# nginx example - allow only management subnet to reach admin paths
location ~* ^/(CFIDE/administrator|CFIDE/adminapi|cfide/administrator) {
    allow 10.0.0.0/24;    # management network
    deny  all;
    proxy_pass http://coldfusion_backend;
}