CVE-2026-75464 in OneNav
Summary
by MITRE • 08/24/2026
OneNav 1.2.4 contains an authenticated arbitrary file deletion vulnerability via import_link().
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Analysis
by VulDB Data Team • 08/24/2026
The vulnerability identified in OneNav version 1.2.4 represents a critical security flaw classified as CWE-22, specifically Improper Limitation of a Pathname to a Restricted Directory, often referred to as path traversal or directory traversal when combined with insufficient validation mechanisms. This issue manifests within the import_link function, which is designed to facilitate the bulk addition of bookmark links by processing imported data files. The core technical deficiency lies in the application's failure to adequately sanitize and validate file paths provided during this import operation. When an authenticated user submits a request containing file path parameters for deletion or manipulation, the backend logic does not sufficiently restrict these inputs to the intended directory structure. This lack of rigorous input validation allows an attacker to manipulate relative paths using standard traversal sequences such as dot-dot-slash (../) to escape the designated upload or data directories and target arbitrary files elsewhere on the server's file system.
From a technical perspective, this vulnerability stems from inadequate boundary checks within the application code handling the import functionality. The function likely concatenates user-supplied path segments with base directory paths without verifying that the resulting absolute path remains within the allowed scope. In many web applications, such flaws arise when developers assume that because authentication is required to access the feature, the risk of file system manipulation is negligible or already mitigated by other controls. However, this assumption fails to account for the fact that authenticated users may have varying levels of privilege, and even low-privileged accounts can often cause significant damage if they possess write permissions over critical application files or configuration settings. The absence of canonicalization checks means that encoded traversal sequences or redundant path separators are not normalized before evaluation, allowing malicious payloads to bypass simple string-matching defenses.
The operational impact of this vulnerability is severe and multifaceted. An attacker who has obtained valid credentials for a low-privilege account can exploit the import_link endpoint to delete arbitrary files on the server. This capability directly undermines the integrity component of the CIA triad, as it allows for the destruction of essential application components, configuration files, or even sensitive data stored in accessible directories. In worst-case scenarios, if the web service runs with elevated privileges or if critical system files are within reach, this could lead to a complete compromise of the underlying operating system. Furthermore, the ability to delete specific files can be used as an initial vector for further attacks, such as disrupting availability by removing core application libraries, thereby causing denial of service conditions that disrupt business operations and degrade user trust in the platform's reliability.
This vulnerability aligns with MITRE ATT&CK technique T1083, which covers File and Directory Discovery, although it extends beyond mere discovery into active modification through deletion. It also relates to T1485, Data Destruction, as the primary outcome is the intentional removal of data. The exploitation requires authentication, placing it within the scope of attacks that leverage compromised user accounts rather than unauthenticated remote code execution or injection flaws. This distinction highlights the importance of implementing defense-in-depth strategies where even authenticated actions are subject to strict least-privilege principles and input validation protocols.
To mitigate this vulnerability, immediate remediation steps should focus on hardening the import_link function's handling of file paths. Developers must implement rigorous canonicalization routines that resolve all relative path references before processing them against a whitelist of allowed directories. It is essential to verify that the resolved absolute path starts with the expected base directory prefix and reject any request where this condition is not met. Additionally, applying strict input validation on all parameters passed to file system operations will prevent unexpected characters or sequences from influencing the execution flow. Beyond code changes, organizations should enforce principle of least privilege by ensuring that the web application process runs under a restricted user account with minimal permissions, limiting the potential blast radius even if an exploitation occurs. Regular security audits and static analysis tools configured to detect path traversal weaknesses can further help identify similar issues across the codebase before they reach production environments.