CVE-2026-47928 Overview
CVE-2026-47928 is an improper input validation vulnerability [CWE-20] affecting Adobe ColdFusion versions 2023.19, 2025.8, and earlier. The flaw allows arbitrary code execution in the context of the current user. Exploitation requires no user interaction and originates from an adjacent network position. The scope is changed, meaning a successful exploit can impact resources beyond the vulnerable component's security authority. Adobe has published a security advisory addressing the issue.
Critical Impact
Adjacent-network attackers can execute arbitrary code on affected ColdFusion servers without user interaction, with scope change enabling impact beyond the vulnerable component.
Affected Products
- Adobe ColdFusion 2023 (version 2023.19 and earlier)
- Adobe ColdFusion 2025 (version 2025.8 and earlier)
- ColdFusion deployments exposed to adjacent network segments
Discovery Timeline
- 2026-06-09 - CVE-2026-47928 published to NVD
- 2026-06-10 - Last updated in NVD database
Technical Details for CVE-2026-47928
Vulnerability Analysis
The vulnerability stems from improper input validation in Adobe ColdFusion's request handling. An attacker on an adjacent network can submit crafted input that bypasses validation routines and leads to arbitrary code execution. Code runs under the privileges of the user account hosting the ColdFusion service, which is often a service account with broad filesystem and database access.
The changed scope indicates that exploitation can affect resources managed by a different security authority. For ColdFusion, this typically means the underlying Java Virtual Machine (JVM), connected databases, or backend integrations reachable from the application server. The EPSS probability is low at the time of publication, but the technical impact remains severe due to the lack of required privileges or user interaction.
Root Cause
The root cause is classified under [CWE-20] Improper Input Validation. ColdFusion fails to adequately validate or sanitize input received through its network-facing interfaces. The deserialization or interpretation path downstream of the validation gap allows attacker-controlled data to influence code execution flow. Adobe has not publicly detailed the specific component, referring administrators to security bulletin APSB26-64.
Attack Vector
The attack vector is adjacent network (AV:A), meaning the attacker must have logical access to the same broadcast or collision domain as the target. The attack complexity is low and requires no authentication or user interaction. A successful exploit grants full confidentiality, integrity, and availability impact on the host. Refer to the Adobe ColdFusion Security Advisory for technical specifics.
Detection Methods for CVE-2026-47928
Indicators of Compromise
- Unexpected child processes spawned by the ColdFusion service account, such as cmd.exe, powershell.exe, or shell interpreters
- New or modified .cfm, .cfc, or .jsp files in ColdFusion webroot directories outside scheduled deployments
- Outbound network connections from the ColdFusion JVM process to untrusted destinations
- Anomalous entries in coldfusion-out.log or exception.log referencing deserialization or class loading errors
Detection Strategies
- Monitor ColdFusion application and access logs for malformed requests targeting administrative endpoints and component invocation paths
- Establish process-lineage baselines for the ColdFusion JVM and alert on deviations such as command interpreter spawns
- Inspect file integrity on the webroot and WEB-INF directories to identify unauthorized webshell drops
Monitoring Recommendations
- Forward ColdFusion logs, Windows or Linux process telemetry, and network flow data to a centralized analytics platform
- Track authentication and administrative actions on the ColdFusion Administrator console for unusual sources
- Alert on outbound connections from ColdFusion hosts to IP addresses outside the documented integration list
How to Mitigate CVE-2026-47928
Immediate Actions Required
- Apply the patches referenced in Adobe security bulletin APSB26-64 to upgrade beyond ColdFusion 2023.19 and 2025.8
- Restrict network access to ColdFusion services so only required management and application segments can reach the server
- Audit ColdFusion service accounts and reduce filesystem, database, and network privileges to the minimum required
- Review recent logs and file changes for indicators of prior exploitation before patching
Patch Information
Adobe has released fixed builds for ColdFusion 2023 and ColdFusion 2025. Administrators should consult the Adobe ColdFusion Security Advisory for the exact patched versions and installer downloads. Apply the update through the ColdFusion Administrator update mechanism or by installing the cumulative hotfix package.
Workarounds
- Place ColdFusion servers behind a web application firewall and block traffic from untrusted adjacent network segments
- Disable unused ColdFusion components, scheduled tasks, and connectors that are not required for production workloads
- Enforce network segmentation so ColdFusion management interfaces are unreachable from general user VLANs
# Example: restrict ColdFusion ports to a management subnet using iptables
iptables -A INPUT -p tcp --dport 8500 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 8500 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
