Coldfusion — CraftedSignal Threat Feed

Adobe ColdFusion Path Traversal Vulnerability (CVE-2026-34619)

hello@craftedsignal.io — Wed, 15 Apr 2026 12:00:00 +0000

CVE-2026-34619 describes a path traversal vulnerability affecting Adobe ColdFusion versions 2023.18, 2025.6, and earlier. Disclosed on April 14, 2026, this vulnerability allows an attacker to bypass intended security restrictions and gain access to sensitive files and directories on the ColdFusion server. The vulnerability exists due to improper limitation of pathnames, and successful exploitation requires no user interaction, making it particularly dangerous. This issue could lead to the exposure of configuration files, source code, or other sensitive data, potentially compromising the entire ColdFusion application and the server it resides on. Organizations using these versions of ColdFusion are vulnerable.

Attack Chain

The attacker identifies a ColdFusion server running a vulnerable version (2023.18, 2025.6, or earlier).
The attacker crafts a malicious HTTP request containing a path traversal sequence (e.g., “../”) in a URL parameter that is used to access files.
The ColdFusion server improperly processes the path, failing to adequately restrict access to files within the intended directory.
The attacker bypasses security restrictions and gains access to files or directories outside of the intended web root.
The attacker reads sensitive configuration files, such as database connection strings or API keys.
The attacker leverages exposed credentials to gain unauthorized access to databases or other systems.
The attacker modifies application code or uploads malicious files to further compromise the server.

Impact

Successful exploitation of CVE-2026-34619 can lead to a complete compromise of the ColdFusion server. An attacker could steal sensitive data, including customer information, proprietary source code, and database credentials. This could result in significant financial losses, reputational damage, and legal repercussions for affected organizations. The lack of required user interaction makes this vulnerability particularly dangerous, as an attacker can exploit it without any user awareness.

Recommendation

Upgrade to a patched version of Adobe ColdFusion as soon as possible. Refer to Adobe’s security bulletin APSB26-38 for the latest updates and instructions (https://helpx.adobe.com/security/products/coldfusion/apsb26-38.html).
Implement the Sigma rule “Detect ColdFusion Path Traversal Attempts” to detect exploitation attempts in web server logs.
Continuously monitor web server logs for suspicious URL patterns and path traversal attempts.

Adobe ColdFusion Improper Input Validation Vulnerability (CVE-2026-27306)

hello@craftedsignal.io — Wed, 15 Apr 2026 12:00:00 +0000

Adobe ColdFusion versions 2023.18, 2025.6, and earlier are susceptible to an improper input validation vulnerability identified as CVE-2026-27306. Successful exploitation of this vulnerability allows an attacker with elevated privileges to execute arbitrary code within the context of the current user. The attack necessitates user interaction, specifically the opening of a malicious file crafted by the attacker. This vulnerability poses a risk to organizations utilizing affected ColdFusion versions, as it could lead to compromised systems and data if exploited successfully. Defenders need to ensure that their systems are up to date to mitigate this risk.

Attack Chain

The attacker identifies a vulnerable ColdFusion server running a version prior to 2023.18 or 2025.6.
The attacker crafts a malicious file designed to exploit the improper input validation vulnerability (CVE-2026-27306). This file could be any format handled by ColdFusion that allows for input validation flaws, like a .cfm or .cfc file.
The attacker social engineers a user with elevated privileges to download and open the malicious file.
When the user opens the file, ColdFusion processes it, triggering the input validation vulnerability.
The improper input validation allows the attacker to inject arbitrary code into the ColdFusion process.
The injected code executes within the context of the user who opened the file, granting the attacker the same privileges.
The attacker can then use this access to install malware, steal sensitive data, or further compromise the system.

Impact

Successful exploitation of CVE-2026-27306 allows an attacker with elevated privileges to achieve arbitrary code execution. The attacker gains access to the system with the privileges of the user who opened the malicious file. This could lead to the compromise of sensitive data, the installation of backdoors, or the complete takeover of the ColdFusion server. While the number of victims and specific sectors targeted are not specified in the provided context, any organization using a vulnerable version of ColdFusion is at risk.

Recommendation

Apply the security patch provided by Adobe to address CVE-2026-27306 on all ColdFusion servers. Refer to the advisory link in the references section.
Implement user training to educate privileged users about the risks of opening files from untrusted sources to mitigate the user interaction requirement of the exploit.
Enable and review ColdFusion logs for suspicious activity related to file processing or code execution, which could indicate exploitation attempts.
Deploy the Sigma rules in this brief to your SIEM to detect exploitation attempts.

Adobe ColdFusion Improper Input Validation RCE

hello@craftedsignal.io — Wed, 15 Apr 2026 12:00:00 +0000

Adobe ColdFusion versions 2023.18, 2025.6, and earlier are susceptible to an improper input validation vulnerability (CVE-2026-27304). This flaw allows for arbitrary code execution within the security context of the current user. The vulnerability is exploitable remotely and requires no user interaction, increasing the potential impact. This vulnerability was disclosed on April 14, 2026. Given the severity and ease of exploitation, organizations using affected ColdFusion versions should prioritize patching and implement detection measures immediately.

Attack Chain

An attacker identifies a vulnerable ColdFusion server running a version prior to 2023.18 or 2025.6.
The attacker crafts a malicious request containing a payload designed to exploit the input validation vulnerability.
The crafted request is sent to a ColdFusion endpoint that processes user-supplied input.
Due to the improper input validation, the malicious payload is processed by the ColdFusion server.
The payload executes arbitrary code within the context of the ColdFusion application user.
The attacker gains unauthorized access to the system, potentially escalating privileges.
The attacker can install malware, exfiltrate sensitive data, or perform other malicious activities.

Impact

Successful exploitation of this vulnerability allows an attacker to execute arbitrary code on the ColdFusion server. This can lead to complete system compromise, including data theft, malware installation, and denial of service. Given the criticality of ColdFusion in many enterprise environments, a successful attack can have significant business impact, leading to financial losses, reputational damage, and legal consequences.

Recommendation

Apply the security patch provided by Adobe as outlined in APSB26-38 to remediate CVE-2026-27304 (reference: https://helpx.adobe.com/security/products/coldfusion/apsb26-38.html).
Monitor web server logs for suspicious POST requests targeting ColdFusion endpoints with unusually long or malformed parameters (reference: webserver log source).
Implement input validation rules in ColdFusion applications to prevent malicious data from being processed (reference: CWE-20).
Deploy the Sigma rule provided below to detect potential exploitation attempts in your web server logs.

KRVTZ-NET IDS Alerts Analysis: Network Scanning and Exploitation Attempts

hello@craftedsignal.io — Fri, 13 Mar 2026 20:52:20 +0000

On March 13, 2026, KRVTZ-NET IDS systems generated a series of alerts indicative of network scanning and attempted exploitation. The alerts highlight suspicious activity originating from a range of IP addresses, suggesting a widespread campaign rather than a targeted attack from a single actor. Specific alerts include repeated GET requests to /remote/logincheck, potentially targeting the Fortigate VPN vulnerability CVE-2023-27997, as well as requests for hidden environment files and attempts…