CVE-2026-48327: Adobe ColdFusion RCE Vulnerability

CVE-2026-48327 Overview

CVE-2026-48327 is an Incorrect Authorization vulnerability [CWE-863] affecting Adobe ColdFusion 2023 and 2025 releases. The flaw allows an authenticated attacker on an adjacent network to execute arbitrary code in the context of the current user. Adobe published the advisory as APSB26-82. Exploitation requires no user interaction and results in a scope change, meaning the impact extends beyond the vulnerable component.

Critical Impact
Successful exploitation grants arbitrary code execution on the ColdFusion server, exposing application data, backend systems, and potentially the underlying host operating system.

Affected Products

Adobe ColdFusion 2023 (base release through Update 21)
Adobe ColdFusion 2025 (base release through Update 10)
Deployments exposing ColdFusion services on shared or adjacent network segments

Discovery Timeline

2026-07-14 - CVE-2026-48327 published to the National Vulnerability Database
2026-07-15 - NVD record last modified

Technical Details for CVE-2026-48327

Vulnerability Analysis

The vulnerability stems from an incorrect authorization check within Adobe ColdFusion. ColdFusion fails to properly validate whether an authenticated principal is permitted to invoke a privileged operation. An attacker with low privileges can bypass the authorization boundary and reach code paths intended for higher-privileged users. Because the CVSS vector reports a changed scope, exploitation impacts components beyond the ColdFusion process itself, including the host operating system and connected services. The AV:A classification indicates the attack must originate from a logically adjacent network, such as the same VLAN, VPN segment, or cloud subnet as the ColdFusion server.

Root Cause

CWE-863 (Incorrect Authorization) applies when software performs an authorization check but uses incorrect logic to determine whether the caller has the required privileges. In ColdFusion, this manifests as a broken access decision that allows a low-privileged authenticated session to reach administrative or execution-capable interfaces. The result is arbitrary code execution under the account running the ColdFusion service.

Attack Vector

An attacker requires network adjacency and a valid low-privileged credential. After authenticating, the attacker issues crafted requests to endpoints protected by the flawed authorization logic. Because scope is changed, the executed code can pivot to interact with resources managed outside the vulnerable ColdFusion runtime, including file systems, databases, and internal services reachable from the server.

Refer to the Adobe ColdFusion Security Advisory APSB26-82 for vendor-provided technical details.

Detection Methods for CVE-2026-48327

Indicators of Compromise

Unexpected outbound network connections from the ColdFusion service account to internal or external hosts.
Creation of new .cfm, .cfc, or .jsp files in web-accessible directories outside normal deployment workflows.
Child processes such as cmd.exe, powershell.exe, bash, or sh spawned by the ColdFusion JVM process (coldfusion.exe or java).
Authentication events from low-privileged ColdFusion accounts followed by administrative-tier API calls.

Detection Strategies

Monitor ColdFusion administrator and API endpoints for requests from user accounts that historically lack administrative activity.
Alert on process lineage anomalies where the ColdFusion JVM spawns interactive shells or scripting interpreters.
Correlate authentication logs with authorization decisions to detect privilege boundary violations.

Monitoring Recommendations

Enable verbose ColdFusion application and administrator logging, forwarding events to a centralized SIEM for correlation.
Baseline normal ColdFusion process behavior and file system writes, then alert on deviations.
Inspect adjacent-network traffic to ColdFusion listeners for authenticated requests originating from unexpected hosts.

How to Mitigate CVE-2026-48327

Immediate Actions Required

Apply the security updates referenced in Adobe advisory APSB26-82 for ColdFusion 2023 and ColdFusion 2025.
Restrict network access to ColdFusion administrator and API endpoints using firewall rules or reverse proxy allowlists.
Rotate credentials for ColdFusion accounts and review authorization roles for least-privilege alignment.
Audit recent authentication and administrative activity for signs of exploitation.

Patch Information

Adobe has released fixed builds for both ColdFusion 2023 and ColdFusion 2025. Administrators should install the update packages linked in the Adobe ColdFusion Security Advisory and validate the applied update level in the ColdFusion Administrator console.

Workarounds

Place ColdFusion behind a web application firewall configured to block requests to administrative endpoints from untrusted sources.
Segment ColdFusion servers onto isolated VLANs to minimize adjacent-network exposure required by the attack vector.
Disable or remove unused ColdFusion components and administrative interfaces to reduce attack surface until patches are applied.

bash

# Configuration example: restrict access to ColdFusion Administrator by source IP (nginx reverse proxy)
location /CFIDE/administrator/ {
    allow 10.0.0.0/24;   # management subnet only
    deny  all;
    proxy_pass http://coldfusion_backend;
}