CVE-2026-47929: ColdFusion Authorization Bypass Leads to Code Execution

Technical summary

CVE-2026-47929 is an Incorrect Authorization vulnerability (CWE-863) in Adobe ColdFusion that permits arbitrary code execution in the authenticated user's context. The attack vector requires adjacent network access and high privileges, but no user interaction is necessary for exploitation. The vulnerability's scope change indicates it can affect resources beyond the vulnerable component itself, making lateral movement and privilege escalation plausible. The high CVSS 3.1 score of 8.4 reflects the combination of high impact across confidentiality, integrity, and availability with relatively low attack complexity.

Business impact

Organizations using affected ColdFusion versions face significant operational risk. A high-privileged attacker exploiting this flaw could gain unauthorized control over user accounts, sessions, or sensitive data processed by ColdFusion applications. This could lead to data breaches, unauthorized modifications to business-critical processes, service disruption, or compliance violations. The scope change means the blast radius extends beyond isolated ColdFusion instances—lateral movement into connected systems becomes feasible for a skilled attacker.

Affected systems

Adobe ColdFusion versions 2023.19, 2025.8 and all earlier versions are vulnerable. Organizations must verify their exact ColdFusion deployment version and check Adobe's official advisory for the complete list of affected releases and any exceptions. Environments with network-accessible ColdFusion instances or those hosting multi-tenant applications are at heightened risk.

Exploitability

Exploitation requires adjacent network access and high-level privileges within the organization—this is not a zero-privilege or remote-from-the-internet attack. However, the requirement for user interaction is absent, meaning once an attacker with elevated credentials is positioned on the network, they can trigger the flaw immediately without social engineering or additional user cooperation. This substantially increases the practical risk in environments where privileged accounts may be compromised through lateral movement or credential theft.

Remediation

Patch affected ColdFusion instances to a patched version released by Adobe addressing CVE-2026-47929. Verify the exact patch version against Adobe's official security advisory. In environments where immediate patching is not feasible, implement network segmentation to restrict ColdFusion access to trusted administrative users and systems, and enforce strict privileged access controls. Monitor for suspicious authentication activity and code execution patterns on ColdFusion servers.

Patch guidance

Contact Adobe or review their official security bulletin for patched versions of ColdFusion 2025.8 and 2023.19 lines. Prioritize patching production systems serving critical business functions. Test patches in a non-production environment before deployment to ensure compatibility with existing configurations and extensions. Given the high-privilege requirement and scope-change nature of this vulnerability, even systems with restricted network exposure should be treated as high priority for patching.

Detection guidance

Monitor ColdFusion application logs and system logs for unexpected code execution, particularly calls to system execution functions or shell commands initiated from ColdFusion services. Look for unusual privilege escalation attempts or session takeover indicators on accounts that interact with ColdFusion. Network-level detection should focus on traffic patterns to ColdFusion from unexpected sources or at unusual times. Endpoint detection and response (EDR) tools should flag suspicious process creation tied to ColdFusion application pools or Java processes.

Why prioritize this

This vulnerability merits immediate attention due to its high CVSS score, direct code execution impact, and scope change allowing cross-boundary exploitation. While the attack requires high privileges and adjacent access—limiting the immediate threat surface—the absence of user interaction requirement and the potential for lateral movement once an attacker gains a foothold make this a serious risk in enterprise environments. Organizations with ColdFusion deployments should prioritize this alongside their most critical security updates.

Risk score, explained

The CVSS 3.1 score of 8.4 (HIGH) reflects multiple aggravating factors: arbitrary code execution capability (full confidentiality, integrity, and availability impact), a scope change indicating cross-boundary risk, and low attack complexity once access prerequisites are met. The mitigating factors—requirement for high privileges and adjacent network access—prevent a critical rating but do not substantially reduce the severity for organizations where these prerequisites may already exist due to other compromises or internal threats.

Frequently asked questions