CVE-2026-3051: Dinky Path Traversal Vulnerability

CVE-2026-3051 Overview

A path traversal vulnerability has been discovered in DataLinkDC Dinky versions up to and including 1.2.5. The vulnerability exists in the getProjectDir function within the file dinky-admin/src/main/java/org/dinky/utils/GitRepository.java, which is part of the Project Name Handler component. Improper handling of the projectName argument allows attackers to manipulate file paths and potentially access files outside the intended directory structure. This vulnerability is remotely exploitable and proof-of-concept exploit code has been publicly disclosed.

Critical Impact

Remote attackers can exploit this path traversal vulnerability to read or potentially write to arbitrary files on the affected system by manipulating the projectName parameter, which could lead to information disclosure, configuration tampering, or further system compromise.

Affected Products

• DataLinkDC Dinky versions up to 1.2.5
• Dinky dinky-admin component
• Systems using the GitRepository.java Project Name Handler

Discovery Timeline

• 2026-02-24 - CVE-2026-3051 published to NVD
• 2026-02-25 - Last updated in NVD database

Technical Details for CVE-2026-3051

Vulnerability Analysis

This vulnerability is classified as CWE-22 (Path Traversal), affecting the Dinky data development platform's administrative module. The flaw resides in the getProjectDir function within dinky-admin/src/main/java/org/dinky/utils/GitRepository.java, which fails to properly sanitize the projectName parameter before using it to construct file system paths.

When a user or automated process supplies a specially crafted projectName value containing directory traversal sequences (such as ../), the application does not adequately validate or neutralize these sequences. This allows an attacker to break out of the intended project directory and access files elsewhere on the file system.

The vulnerability is exploitable remotely over the network and requires low privileges to execute. According to the disclosure, the vendor was contacted about this vulnerability but did not respond.

Root Cause

The root cause of CVE-2026-3051 is insufficient input validation in the getProjectDir function. The function accepts the projectName argument and uses it to build file paths without properly sanitizing or canonicalizing the input. This allows directory traversal characters to be processed as legitimate path components, enabling attackers to navigate to parent directories or arbitrary file system locations.

Attack Vector

The attack can be performed remotely over the network. An authenticated attacker with low privileges can manipulate the projectName parameter in requests to the Dinky admin interface. By injecting path traversal sequences such as ../ or encoded variants, the attacker can cause the application to access files outside the designated project directory.

For example, an attacker might supply a projectName value like ../../etc/passwd or ..\..\windows\system32\config\sam to attempt reading sensitive system files. The exact impact depends on the application's file system permissions and the context in which the vulnerable function is called.

Technical details and proof-of-concept information are available in the GitHub Issue Discussion and the VulDB Analysis #347409.

Detection Methods for CVE-2026-3051

Indicators of Compromise

• Unusual file access patterns in application logs, particularly requests containing ../ or encoded traversal sequences in project name parameters
• Access attempts to sensitive system files such as /etc/passwd, configuration files, or application credentials
• Error logs indicating file not found or permission denied for paths outside the expected project directories
• Web server access logs showing requests with URL-encoded path traversal characters (%2e%2e%2f)

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block path traversal patterns in HTTP requests
• Enable detailed logging for the Dinky admin interface and monitor for anomalous project name values
• Use file integrity monitoring (FIM) tools to detect unauthorized access to sensitive files outside application directories
• Deploy intrusion detection systems (IDS) with signatures for common path traversal attack patterns

Monitoring Recommendations

• Monitor application logs for requests containing directory traversal sequences in the projectName parameter
• Set up alerts for file access outside the designated project directory structure
• Track authentication events and correlate with suspicious file access patterns to identify potential exploitation attempts
• Review access logs regularly for patterns indicative of reconnaissance or exploitation activity

How to Mitigate CVE-2026-3051

Immediate Actions Required

• Restrict network access to the Dinky admin interface to trusted networks only
• Implement additional authentication controls for the Project Name Handler functionality
• Deploy a web application firewall (WAF) with rules to block path traversal patterns
• Review and limit file system permissions for the application service account to minimize potential impact

Patch Information

At the time of this advisory, the vendor (DataLinkDC) was contacted regarding this vulnerability but did not respond. No official patch has been confirmed. Organizations should monitor the VulDB Entry #347409 and the official Dinky project repositories for security updates. Consider upgrading to newer versions if available and verifying they address this vulnerability.

Workarounds

• Implement input validation at the network perimeter using a WAF to filter requests containing path traversal sequences
• Restrict access to the Dinky admin interface using network segmentation and firewall rules
• Consider implementing a reverse proxy with additional input sanitization before requests reach the application
• If possible, modify the application code to implement proper path canonicalization and validation before processing projectName values

# Example: Restrict access to Dinky admin interface using iptables
# Allow access only from trusted management network
iptables -A INPUT -p tcp --dport 8888 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 8888 -j DROP

# Example: Nginx WAF rule to block path traversal attempts
# Add to your nginx configuration
location /api/project {
    if ($request_uri ~* "\.\.") {
        return 403;
    }
    proxy_pass http://dinky-backend;
}