CVE-2026-9166 in GisLab Laboratory Management System
Summary
by MITRE • 09/10/2026
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in GIS Informatics GisLab Laboratory Management System allows Path Traversal.
This issue affects GisLab Laboratory Management System: from 1.4.03 before 1.5.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 09/10/2026
The identified security flaw represents a classic path traversal vulnerability within the GisLab Laboratory Management System, specifically affecting versions ranging from 1.4.03 up to but not including version 1.5. This type of weakness is formally categorized under CWE-22: Improper Limitation of a Pathname to a Restricted Directory in the Common Weakness Enumeration database. The core technical issue stems from insufficient validation or sanitization of user-supplied input that dictates file system paths. When an application constructs file paths by concatenating user-controlled data with a base directory without properly restricting access, it creates an opportunity for attackers to manipulate those inputs to escape the intended restricted context. In this specific instance, the vulnerability allows an actor to traverse outside the designated secure directories, potentially accessing files and directories that reside on the underlying file system but are not meant to be accessible through the application interface.
From a technical perspective, path traversal attacks typically exploit the way operating systems interpret directory separators such as dot-dot-slash sequences or encoded variations thereof. By injecting these sequences into input fields handled by the GisLab Laboratory Management System, an attacker can redirect read or write operations to arbitrary locations on the server hosting the application. This lack of strict boundary enforcement means that the software fails to verify whether the resolved absolute path remains within the expected sandboxed environment. Consequently, the integrity and confidentiality guarantees provided by the directory structure are compromised because the system trusts input data without adequately verifying its legitimacy against a whitelist or applying robust normalization techniques before processing file operations.
The operational impact of this vulnerability is significant depending on the privileges under which the GisLab Laboratory Management System operates. If the application runs with elevated permissions, an attacker could potentially read sensitive configuration files, source code, database credentials, or other critical system data stored outside the web root. In more severe scenarios where write access is also compromised due to similar input handling flaws, it may be possible to overwrite existing files or create new malicious scripts within accessible directories, leading to remote code execution. This undermines the confidentiality of laboratory management data and poses a risk to the overall stability and security posture of the hosting infrastructure. The vulnerability aligns with ATT&CK technique T1083: File and Directory Discovery, as it enables an adversary to enumerate and access restricted files on the target system.
To mitigate this path traversal risk, developers must implement strict input validation strategies that reject any characters or sequences indicative of directory navigation outside the allowed scope. It is essential to canonicalize all file paths before processing them to resolve symbolic links and relative references into their absolute forms, ensuring they start with the expected base directory prefix. Additionally, employing a whitelist approach for permitted filenames and extensions can further reduce the attack surface. Upgrading to version 1.5 or later of the GisLab Laboratory Management System is recommended as it likely contains patches addressing this specific input validation deficiency. Until an upgrade is performed, deploying web application firewalls with rulesets capable of detecting path traversal patterns may provide a layer of defense in depth against exploitation attempts targeting older versions of the software.