CVE-2026-3526 identifies an incorrect authorization vulnerability in the deprecated Drupal File Access Fix module, versions before 1.2.0, specifically version 0.0.0. This vulnerability is classified under CWE-863, which pertains to improper authorization mechanisms that fail to adequately restrict access to resources. The flaw allows an attacker to perform forceful browsing, a technique where unauthorized users can directly request URLs or file paths to access restricted files or directories without proper permission checks. The module in question was designed to control file access within Drupal environments, but due to this vulnerability, it fails to enforce these restrictions correctly. No CVSS score has been assigned, and no patches have been officially released, likely due to the module's deprecated status. No known exploits have been reported in the wild, but the risk remains significant because the module is still in use in some Drupal deployments. The vulnerability impacts confidentiality by potentially exposing sensitive files and may affect integrity if unauthorized file access leads to further exploitation. The attack vector is remote and does not require authentication or user interaction, making it easier to exploit if the module is present. Given Drupal's extensive use worldwide, especially in sectors managing sensitive data, this vulnerability demands attention despite the module's deprecated status.

The primary impact of CVE-2026-3526 is unauthorized disclosure of sensitive files due to improper authorization checks, compromising confidentiality. Organizations relying on the deprecated File Access Fix module risk exposure of internal documents, configuration files, or other protected resources. This can lead to data breaches, intellectual property theft, or leakage of personal information, which may result in regulatory penalties and reputational damage. Additionally, unauthorized file access could serve as a foothold for attackers to escalate privileges or conduct further attacks within the affected Drupal environment. Since the vulnerability does not require authentication or user interaction, it can be exploited remotely by unauthenticated attackers, increasing the threat surface. The lack of an official patch and the deprecated status of the module complicate remediation efforts, potentially prolonging exposure. Organizations with public-facing Drupal sites using this module are particularly at risk. The impact is thus medium to high depending on the sensitivity of accessible files and the criticality of the affected systems.

1. Immediately identify and inventory any Drupal installations using the deprecated File Access Fix module, especially versions prior to 1.2.0. 2. Remove or disable the deprecated File Access Fix module entirely, as it is no longer maintained and poses security risks. 3. Replace the deprecated module with supported, actively maintained alternatives that provide robust file access control within Drupal. 4. Implement strict web server-level access controls to restrict direct access to sensitive files and directories as an additional defense layer. 5. Conduct thorough access control audits and penetration testing on Drupal sites to detect any unauthorized file access paths. 6. Monitor web server logs for suspicious forceful browsing attempts or unusual file access patterns. 7. Educate development and operations teams about the risks of using deprecated modules and the importance of timely updates and patches. 8. If immediate removal is not feasible, implement custom access control rules or web application firewall (WAF) policies to block unauthorized file access attempts targeting the vulnerable module. 9. Stay informed about Drupal security advisories for any future updates or patches related to this or similar vulnerabilities.