CVE-2026-78312 in DIAEnergie
Summary
by MITRE • 09/24/2026
Path Traversal in DIAEnergie.
This issue affects DIAEnergie: before 1.11.00.022.
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Analysis
by VulDB Data Team • 09/24/2026
The vulnerability identified as a path traversal flaw within the DIAEnergie software, specifically affecting versions prior to build number 1.11.00.022, represents a critical security deficiency in how the application handles file system inputs. Path traversal vulnerabilities occur when an attacker can manipulate input parameters to access files and directories that are stored outside the expected root directory of the web server or application. This type of flaw typically arises from insufficient validation or sanitization of user-supplied data before it is used as part of a file path operation. In the context of DIAEnergie, this likely involves endpoints where users can upload files, download documents, or interact with system resources using relative paths that are not properly constrained to their designated directories.
From a technical perspective, the core issue lies in the application's failure to normalize and validate file paths against a strict allowlist or chroot environment. When an attacker supplies a maliciously crafted string containing directory traversal sequences such as dot-dot-slash characters followed by absolute path indicators, the underlying operating system resolves these references relative to the current working directory rather than restricting them to the intended application folder. This allows the execution of file operations on arbitrary locations within the server's file system. The severity of this vulnerability is significantly amplified if the DIAEnergie service runs with elevated privileges or has broad read and write permissions across critical system directories, potentially exposing sensitive configuration files, database credentials, source code, or other confidential data stored in non-public areas of the disk structure.
The operational impact of exploiting this path traversal flaw can be severe depending on the specific capabilities granted to the DIAEnergie process by the host operating system. An attacker could achieve unauthorized read access to critical system files such as password hashes, private keys, or internal application configurations that contain secrets necessary for further exploitation. In more complex scenarios where write permissions are also exposed through similar misconfigurations, an attacker might overwrite existing files with malicious content, potentially leading to remote code execution if the overwritten file is later executed by a privileged process or included in server-side script logic. This vulnerability aligns directly with CWE-22 Improper Limitation of a Pathname to a Restricted Directory and often serves as a precursor for more critical attacks such as Local File Inclusion when combined with other input validation flaws, mapping closely to the ATT&CK technique T1083 which involves file and directory discovery.
To mitigate this vulnerability, immediate action is required by upgrading DIAEnergie to version 1.11.00.022 or any subsequent release that addresses these path handling issues. If an upgrade is not immediately feasible, administrators should implement strict input validation on all parameters used in file operations, ensuring that only alphanumeric characters and safe delimiters are accepted while rejecting traversal sequences. Additionally, employing a whitelist approach for allowed filenames and utilizing secure API functions that resolve paths to absolute canonical forms before processing can prevent the resolution of relative path components outside the intended scope. It is also advisable to run the DIAEnergie application with minimal necessary privileges using principle of least privilege concepts, ensuring that even if an attacker successfully exploits this flaw, their ability to access or modify sensitive system files remains severely restricted by operating system permissions and sandboxing mechanisms.