GuardDog Path Traversal Vulnerability Leads to Arbitrary File Overwrite and RCE

The path traversal vulnerability in GuardDog allows attackers to manipulate file paths during package extraction. By crafting malicious PyPI packages, an attacker can bypass intended directory restrictions and write files to arbitrary locations on the system. This can lead to several severe consequences, including overwriting critical system files, injecting malicious code, and ultimately achieving remote code execution. Successful exploitation could grant an attacker complete control over the affected system, enabling them to steal sensitive data, install malware, or disrupt operations. The impact is particularly concerning given GuardDog's role in securing Python environments.

Organizations utilizing GuardDog for automated software deployment, dependency management, or package extraction are at significant risk. This includes DevOps teams, CI/CD pipelines, and any environment where third-party Python packages are automatically installed. Shared hosting environments where multiple users may have access to the system are particularly vulnerable.

• python / supply-chain:

import os
import zipfile

def safe_extract(archive_path, extract_to):
    with zipfile.ZipFile(archive_path, 'r') as zipf:
        for member in zipf.infolist():
            # Check if the extracted path is within the allowed directory
            if not extract_to in member.filename:
                print(f"Suspicious file: {member.filename}")

• generic web: Check for unusual file modifications in the GuardDog installation directory using file integrity monitoring tools.

1. 2026-01-13Disclosure

   disclosure

1. Reserviert2026-01-12
2. Veröffentlicht2026-01-13
3. Geändert2026-02-03
4. EPSS aktualisiert2026-03-23

The primary mitigation for CVE-2026-22871 is to upgrade GuardDog to version 2.7.1 or later, which contains the fix for this vulnerability. If an immediate upgrade is not feasible, consider implementing temporary workarounds such as restricting the directories where GuardDog extracts packages. Reviewing and auditing PyPI packages before installation is also crucial. Implement robust input validation and sanitization to prevent malicious path manipulation. Monitor system logs for unusual file creation or modification activity, particularly within directories targeted by GuardDog.