External risk intelligence

Adobe ColdFusion Path Traversal Vulnerability Allows File Access

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2026-48313

Adobe ColdFusion is a commercial application server platform typically deployed to host web applications and public-facing APIs. As a server-side technology, it is commonly positioned within a network architecture to process requests from the public internet, making the vulnerable path traversal interface reachable in many standard deployment scenarios.

Path Traversal

Adobe Coldfusion

20232025

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability has been identified in Adobe ColdFusion, which allows attackers to read sensitive files and potentially write to limited areas on the system. This issue impacts the ability of the application server to properly manage file paths, creating a security risk. The main concern is confirming if this technology is in use and assessing potential exposure.

Path traversal allows unauthorized file access.
Confirms relevance and exposure for decision-makers.
Understand system use and assess potential impact.

Attack Path

How an attacker could exploit the issue

An attacker can reach a vulnerable component in Adobe ColdFusion by exploiting a path traversal flaw. This allows them to read sensitive files and potentially write to parts of the file system they should not access. The vulnerability can be exploited over the network without any user interaction, and it changes the scope of access.

No user interaction needed for attack.
Path traversal triggers vulnerability.
Unauthorized file access and modification.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to read sensitive files from the server's file system, potentially exposing configuration details or other confidential information. In some cases, limited write access may also be possible, which could lead to further system compromise.

Sensitive system or user files.
Arbitrary file system access.
Unauthorized information disclosure.

Operational Fix

Recommended remediation, mitigation, and detection steps

Given that Adobe ColdFusion is affected, ownership likely falls to application or platform teams responsible for these servers. The critical first step is to identify all deployed instances, determine their exposure, and confirm business criticality before planning remediation.

Application or platform teams own the issue.
Verify instance exposure and criticality first.
Plan remediation based on risk assessment.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is Adobe ColdFusion?

Adobe ColdFusion is a commercial application server platform used to build, deploy, and host dynamic web applications and public-facing APIs. It acts as the engine that processes server-side code to generate the content users see in their web browsers. Because it handles complex application logic and database interactions, it is often a core component of an organization's web infrastructure.

What does CWE-22 mean for CVE-2026-48313?

CWE-22 refers to an 'Improper Limitation of a Pathname to a Restricted Directory,' commonly known as path traversal. In the context of this CVE, it means the software fails to properly validate file paths provided by a user. An attacker can use special character sequences, like dot-dot-slash, to 'climb' out of the application's allowed directories, potentially reading sensitive files or writing to restricted locations on the underlying server.

How is this vulnerability triggered?

This flaw is triggered when an attacker sends specifically crafted network requests to the vulnerable ColdFusion server. Critically, no user interaction is required for a successful attempt; the server processes the malicious path directly. It is important to note that the vulnerability exists within the application's path handling logic; standard, authorized requests that do not contain directory traversal sequences will not trigger the bug.

Why does Halo Surface Signal categorize this as external?

Halo Surface Signal flags this as external because Adobe ColdFusion is typically deployed to handle incoming traffic from the public internet. Since the path traversal interface is reachable over a network without requiring authentication, any ColdFusion instance exposed to the internet is a primary concern. Even internal deployments should be reviewed, but internet-facing servers are prioritized due to their accessibility to potential attackers.

What should I do if I run ColdFusion?

If you manage ColdFusion instances, your immediate priority is to locate all active deployments across your environment. Once identified, evaluate the criticality of the data hosted on each server and confirm if they are reachable from the network. Coordinate with your application or platform teams to assess the risk of each specific instance and begin planning your remediation path based on these findings.

References

helpx.adobe.com/security/products/coldfusion/apsb26-68.html

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.