CVE-2026-48316: Adobe ColdFusion RCE Vulnerability

CVE-2026-48316 Overview

CVE-2026-48316 is an improper input validation vulnerability [CWE-20] affecting Adobe ColdFusion versions 2025.9, 2023.20, and earlier. The flaw allows remote attackers to execute arbitrary code in the context of the current user without any user interaction. The vulnerability is network-accessible, requires no privileges, and results in a scope change according to the CVSS vector.

Adobe published a security advisory tracked as APSB26-68 addressing this issue. The vulnerability carries the maximum CVSS base score, reflecting the combination of remote exploitability, lack of prerequisites, and cross-scope impact on confidentiality and integrity.

Critical Impact
Unauthenticated attackers can execute arbitrary code on affected ColdFusion servers over the network, potentially compromising hosted applications, backend data stores, and adjacent systems within the same trust boundary.

Affected Products

Adobe ColdFusion 2025 (through Update 9)
Adobe ColdFusion 2023 (through Update 20)
Earlier ColdFusion 2023 releases including base and Updates 1 through 19

Discovery Timeline

2026-07-06 - CVE-2026-48316 published to NVD
2026-07-09 - Last updated in NVD database

Technical Details for CVE-2026-48316

Vulnerability Analysis

CVE-2026-48316 stems from improper input validation within Adobe ColdFusion's request handling logic. ColdFusion processes untrusted input without sufficient sanitization, allowing an attacker to influence execution paths in ways that ultimately result in arbitrary code execution. Because the vulnerability changes scope, code executed through the flaw can affect resources beyond the initially vulnerable component.

ColdFusion is a rapid application development platform commonly deployed on internet-facing web tiers. Successful exploitation gives an attacker the ability to run commands, read sensitive files, deploy web shells, or pivot to internal networks. The EPSS score of 1.396% (69.174 percentile) indicates a notable probability of exploitation activity relative to the broader CVE population.

Root Cause

The root cause is a failure to properly validate or sanitize attacker-controlled input before it is used in a security-sensitive operation. Improper input validation [CWE-20] in server-side application platforms frequently leads to code execution when input reaches interpreters, deserializers, or file system operations without normalization or type enforcement.

Attack Vector

Exploitation occurs over the network against exposed ColdFusion endpoints. No authentication, privileges, or user interaction are required. An attacker sends a crafted request to a vulnerable server, triggering the input validation flaw and gaining code execution in the context of the ColdFusion process account.

No verified public proof-of-concept is available at the time of publication. Refer to the Adobe ColdFusion Security Advisory APSB26-68 for vendor-supplied technical details.

Detection Methods for CVE-2026-48316

Indicators of Compromise

Unexpected child processes spawned by the ColdFusion JVM (coldfusion.exe, jrun.exe, or java processes launching shells such as cmd.exe, powershell.exe, /bin/sh, or /bin/bash).
New or modified .cfm, .cfml, or .jsp files in ColdFusion web roots, especially in directories such as CFIDE, cfusion/wwwroot, or customer application paths.
Outbound network connections from the ColdFusion service to unfamiliar IP addresses or known command-and-control infrastructure.
Anomalous HTTP POST requests to ColdFusion administrative endpoints or component invocation URLs originating from external sources.

Detection Strategies

Monitor process lineage from the ColdFusion service and alert on any interpreter or scripting engine spawned as a child.
Deploy web application firewall rules that inspect requests to ColdFusion component (/CFIDE/, /cfusion/, .cfc, .cfm) endpoints for unusual payload structures.
Correlate authentication logs, HTTP access logs, and endpoint telemetry to identify unauthenticated requests followed by shell activity on the same host.

Monitoring Recommendations

Ingest ColdFusion application logs, IIS or Apache access logs, and host process telemetry into a centralized analytics platform for cross-source correlation.
Track file integrity in ColdFusion web roots and configuration directories to detect web shell drops and configuration tampering.
Baseline outbound traffic from ColdFusion hosts and alert on new destinations, especially over non-standard ports.

How to Mitigate CVE-2026-48316

Immediate Actions Required

Inventory all Adobe ColdFusion instances and identify versions 2025.9, 2023.20, and any earlier releases as urgent patching candidates.
Apply the security update referenced in Adobe advisory APSB26-68 to all affected servers.
Restrict network exposure of ColdFusion administrative interfaces and component endpoints to trusted management networks only.
Review recent web server and ColdFusion logs for signs of exploitation, focusing on unauthenticated requests to component and administrator paths.

Patch Information

Adobe has released fixed versions addressing CVE-2026-48316. Consult the Adobe ColdFusion Security Advisory APSB26-68 for exact patched build numbers, download locations, and installation guidance. Apply the update in a test environment first, then roll out to production following change control procedures.

Workarounds

Place ColdFusion servers behind a web application firewall with rules that block requests to administrative and component endpoints from untrusted sources.
Enforce the principle of least privilege on the ColdFusion service account so that any code execution occurs in a restricted context.
Segment ColdFusion hosts from sensitive internal systems to limit lateral movement following exploitation.
Disable unused ColdFusion features, connectors, and sample applications to reduce the attack surface until patches are applied.

bash

# Example: restrict access to ColdFusion administrator paths at the reverse proxy
# (nginx snippet - adapt to your environment)
location ~* ^/(CFIDE/administrator|cfusion/administrator|CFIDE/adminapi) {
    allow 10.0.0.0/8;      # management network
    deny all;
    proxy_pass http://coldfusion_backend;
}