CVE-2026-34619: Adobe ColdFusion Path Traversal Vulnerability

CVE-2026-34619 Overview

CVE-2026-34619 is a Path Traversal vulnerability affecting Adobe ColdFusion versions 2023.18, 2025.6 and earlier. This vulnerability allows an attacker to bypass security restrictions and access unauthorized files or directories outside the intended restricted paths. The vulnerability can be exploited remotely over the network without requiring user interaction, making it particularly dangerous for internet-exposed ColdFusion servers.

Critical Impact

Attackers can leverage this path traversal vulnerability to bypass security features and access sensitive files or directories outside intended restrictions, potentially leading to information disclosure or further system compromise.

Affected Products

• Adobe ColdFusion 2023 (all versions through Update 18)
• Adobe ColdFusion 2025 (all versions through Update 6)
• All ColdFusion deployments without the latest security patches

Discovery Timeline

• April 14, 2026 - CVE-2026-34619 published to NVD
• April 16, 2026 - Last updated in NVD database

Technical Details for CVE-2026-34619

Vulnerability Analysis

This vulnerability stems from improper limitation of a pathname to a restricted directory, commonly classified as CWE-22 (Path Traversal). The flaw allows authenticated attackers to craft malicious requests that traverse outside the intended directory boundaries, bypassing security controls designed to restrict file access to specific paths.

The attack can be conducted remotely over the network and does not require any user interaction. While an attacker needs low-level privileges to exploit this vulnerability, the scope of impact extends beyond the vulnerable component itself, potentially affecting other parts of the system. The primary impact is on system availability, which can be severely compromised through exploitation.

Root Cause

The root cause of CVE-2026-34619 lies in insufficient input validation and sanitization of user-supplied path components within ColdFusion's file handling mechanisms. When processing file requests, the application fails to properly validate and canonicalize file paths, allowing directory traversal sequences (such as ../) to escape the intended restricted directory.

The improper path validation allows attackers to construct requests that reference files and directories outside the application's designated sandbox, effectively bypassing the security boundaries that should confine file operations to specific directories.

Attack Vector

The attack vector is network-based, requiring the attacker to send specially crafted HTTP requests to the vulnerable ColdFusion server. The attacker must have low-level authentication privileges to execute the attack, but no user interaction is required from the victim side.

An attacker would typically craft HTTP requests containing directory traversal sequences in file path parameters. These malicious path components allow navigation outside the intended directory structure, enabling access to sensitive system files, configuration data, or other protected resources.

The vulnerability primarily impacts system availability, with the potential for denial of service conditions. Organizations running affected ColdFusion versions should prioritize patching, especially for internet-facing deployments.

Detection Methods for CVE-2026-34619

Indicators of Compromise

• HTTP requests containing multiple directory traversal sequences (../, ..%2f, %2e%2e/) in URL parameters or request bodies
• Unusual file access patterns in ColdFusion application logs showing attempts to access files outside web root directories
• Failed or successful access attempts to system configuration files, operating system files, or sensitive directories
• Anomalous traffic patterns targeting ColdFusion file handling endpoints

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block requests containing path traversal patterns
• Configure ColdFusion server logging to capture detailed request information and monitor for suspicious file path patterns
• Deploy network-based intrusion detection systems (IDS) with signatures for path traversal attack patterns
• Enable SentinelOne's behavioral AI engine to detect anomalous file access patterns indicative of path traversal exploitation

Monitoring Recommendations

• Continuously monitor ColdFusion server logs for requests containing encoded or decoded directory traversal sequences
• Set up alerts for any file access attempts outside designated application directories
• Monitor network traffic for large volumes of requests targeting ColdFusion endpoints with path manipulation attempts
• Implement file integrity monitoring on sensitive configuration files and directories

How to Mitigate CVE-2026-34619

Immediate Actions Required

• Apply the latest security update from Adobe immediately for all ColdFusion 2023 and 2025 installations
• Review and restrict network access to ColdFusion servers, limiting exposure to trusted networks only
• Implement WAF rules to block path traversal patterns as an interim mitigation measure
• Audit ColdFusion server configurations to ensure proper file system permissions and directory restrictions

Patch Information

Adobe has released security updates to address this vulnerability. Affected organizations should apply the patches documented in Adobe Security Bulletin APSB26-38.

For ColdFusion 2023, update to a version newer than Update 18. For ColdFusion 2025, update to a version newer than Update 6. Verify successful patch application by checking the ColdFusion version in the administrator console.

Workarounds

• Restrict ColdFusion server access to trusted IP addresses only using firewall rules until patches can be applied
• Implement strict input validation at the application layer to sanitize all file path parameters
• Configure web server or reverse proxy rules to block requests containing directory traversal patterns
• Disable or restrict access to ColdFusion features that involve file system operations if not required for business functions

# Example: Block path traversal patterns in Apache mod_rewrite
# Add to ColdFusion virtual host configuration
RewriteEngine On
RewriteCond %{REQUEST_URI} (\.\./|\.\.%2f|%2e%2e/) [NC]
RewriteRule .* - [F,L]