CVE-2026-32820 in dataCycle-CORE
Summary
by MITRE • 07/20/2026
dataCycle is a data management system for centrally storing, managing, searching, finding, and distributing data. In dataCycle-CORE, the module handling core processing and framework rules, before and including version 25.07.3, the documentation and static markdown renderer accepts attacker-controlled path segments and only runs them through the Rails HTML sanitizer, which does not remove directory traversal sequences. An unauthenticated attacker can traverse out of the intended `docs` or `static` directories and render arbitrary `.md` files from the application root or engine root. This is patched in version 26.06.08.
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Analysis
by VulDB Data Team • 07/20/2026
The dataCycle-CORE system presents a critical directory traversal vulnerability that fundamentally compromises the application's security boundaries and data isolation mechanisms. This flaw exists within the documentation and static markdown renderer component, which serves as a gateway for rendering user-facing content from markdown files stored within the application's file system. The vulnerability stems from inadequate input validation and sanitization of path segments that are directly accepted from external sources without proper security controls.
The technical implementation of this vulnerability allows an attacker to manipulate path traversal sequences such as ../ or ..\ that bypass the Rails HTML sanitizer's limited filtering capabilities. This sanitizer, while designed to prevent XSS attacks by removing dangerous HTML elements, fails to address directory traversal patterns that could lead to unauthorized file access. The flaw manifests when the system processes attacker-controlled path segments that are intended for rendering markdown documentation or static content files. These unvalidated paths are then processed through the application's file system traversal logic without proper boundary checks.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides an unauthenticated attacker with the capability to access any markdown file within the application's root directory structure. This means that sensitive documentation, configuration files, or even source code comments could be exposed through the rendered content interface. The vulnerability affects versions up to and including 25.07.3, creating a window where attackers could systematically explore the application's file system hierarchy to discover valuable information. The attack vector requires no authentication, making it particularly dangerous as it can be exploited by anyone with access to the affected system.
This vulnerability aligns with CWE-22 Directory Traversal and represents a classic case of insufficient input validation that allows arbitrary file system access. From an ATT&CK perspective, this maps to T1083 File and Directory Discovery and potentially T1566 Initial Access through web application vulnerabilities. The exploitation chain involves identifying the vulnerable documentation endpoint, crafting malicious path traversal sequences, and then observing rendered content to confirm successful file access. The patch implemented in version 26.06.08 addresses this by introducing proper path validation that prevents directory traversal sequences from being processed within the markdown rendering pipeline.
Organizations using dataCycle-CORE should immediately implement mitigations including upgrading to version 26.06.08 or later, implementing additional input validation at the application level, and conducting thorough file system access reviews. The fix demonstrates the importance of comprehensive security testing that covers not just injection vulnerabilities but also path traversal scenarios that can bypass traditional sanitization approaches. Regular security assessments should include testing for directory traversal vulnerabilities in all file system operations, particularly those involving user-supplied input that is processed through content rendering pipelines.