CVE-2026-19762 in Taier
Summary
by MITRE • 08/14/2026
A vulnerability was found in DTStack Taier 1.4.0. Affected by this vulnerability is the function Paths.ge of the file FileChunkController.java of the component Chunk-Check Endpoint. The manipulation of the argument Name results in path traversal. The attack may be launched remotely. The exploit has been made public and could be used.
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Analysis
by VulDB Data Team • 08/14/2026
This vulnerability exists in DTStack Taier version 1.4.0 within the Chunk-Check Endpoint functionality, specifically in the Paths.ge method of FileChunkController.java file. The flaw represents a classic path traversal vulnerability that allows attackers to manipulate file system access through crafted input parameters. The vulnerability is triggered when the Name argument is processed, enabling unauthorized access to files outside the intended directory structure. This type of vulnerability falls under CWE-22 Path Traversal and aligns with ATT&CK technique T1059 Command and Scripting Interpreter where adversaries can leverage path traversal to execute arbitrary commands or access sensitive data.
The technical implementation involves improper validation of user-supplied input within the file chunking endpoint, where the Name parameter is directly used in file system operations without adequate sanitization or normalization. Attackers can exploit this by crafting malicious paths containing directory traversal sequences such as ../ or ..\ that bypass normal access controls and potentially read arbitrary files on the server. The vulnerability is particularly dangerous because it allows remote exploitation without requiring authentication, making it an attractive target for automated attacks.
The operational impact of this vulnerability extends beyond simple information disclosure to potential system compromise and data exfiltration. An attacker could access sensitive configuration files, database credentials, application source code, or other confidential data stored on the server. The public availability of exploits means that this vulnerability is actively being used in the wild, increasing the risk to organizations running affected versions. This creates an urgent need for immediate remediation as the attack surface remains exposed to automated scanning and exploitation tools.
Organizations should implement immediate mitigations including input validation and sanitization of all user-supplied parameters, particularly those used in file system operations. The recommended approach involves normalizing file paths, implementing strict access controls, and using secure coding practices that prevent path traversal attacks. Network segmentation and firewall rules can provide additional defense-in-depth layers to limit access to the vulnerable endpoint. Regular security updates and patch management processes should be enforced to address similar vulnerabilities in other components. The vulnerability demonstrates the critical importance of validating all external inputs and implementing proper access controls for file system operations as outlined in OWASP Top Ten and NIST cybersecurity frameworks.