CVE-2026-3067 is a path traversal vulnerability identified in the HummerRisk software up to version 1.5.0, specifically within the archive extraction component implemented in the extractTarGZ and extractZip functions of the CommandUtils.java file. The vulnerability arises due to insufficient validation of file paths during the extraction of TAR.GZ and ZIP archives, allowing an attacker to craft malicious archives that, when extracted, write files outside the intended extraction directory. This can lead to overwriting critical files or placing malicious files in sensitive locations. The vulnerability can be exploited remotely without user interaction and requires only limited privileges, making it relatively easy to exploit in environments where HummerRisk processes untrusted archives. The CVSS 4.0 base score is 5.3 (medium severity), reflecting the moderate impact on confidentiality, integrity, and availability, with no requirement for user interaction or elevated privileges beyond limited access. The vendor has been notified but has not issued a patch or response, and no known exploits are currently active in the wild. This increases the urgency for organizations to implement mitigations proactively. The lack of patch availability means organizations must rely on compensating controls to reduce risk. The vulnerability affects all versions from 1.0 through 1.5.0, indicating a long-standing issue in the archive extraction logic.

The path traversal vulnerability in HummerRisk can allow attackers to write arbitrary files to locations outside the intended extraction directory, potentially overwriting critical system or application files. This can lead to unauthorized code execution, privilege escalation, or denial of service if essential files are corrupted or replaced. For organizations, this could mean compromise of the risk management platform itself, leading to loss of data integrity and confidentiality. Since HummerRisk is used in risk assessment and management, exploitation could disrupt business continuity and decision-making processes. The remote exploitability without user interaction increases the attack surface, especially in environments where untrusted archives are processed automatically. The medium CVSS score reflects moderate but tangible risk, particularly in environments lacking strict access controls or network segmentation. The absence of vendor response and patches prolongs exposure, increasing the window for potential exploitation. Organizations relying on HummerRisk in critical sectors such as finance, healthcare, or government may face heightened operational and reputational risks.

1. Immediately restrict the sources of archive files processed by HummerRisk to trusted and verified origins only, preventing untrusted or user-supplied archives from being extracted. 2. Implement strict input validation and path sanitization on archive contents before extraction to ensure no file paths contain traversal sequences or absolute paths. 3. Run the archive extraction process with the least privileges possible, ideally within a sandboxed or containerized environment to limit the impact of any successful exploitation. 4. Monitor file system changes in directories used for extraction to detect unauthorized writes or modifications promptly. 5. Employ network segmentation to isolate HummerRisk servers from untrusted networks and limit remote access to authorized personnel only. 6. Maintain comprehensive logging and alerting for suspicious archive processing activities. 7. Engage with the vendor or community for updates and patches, and plan for rapid deployment once available. 8. Consider alternative tools or temporary workarounds that do not rely on vulnerable extraction functions until a patch is released.