CVE-2026-0945 is a vulnerability classified under CWE-267 (Privilege Defined With Unsafe Actions) affecting the Drupal Role Delegation module versions 1.3.0 up to but not including 1.5.0. The issue arises because the module improperly defines privileges that allow users to delegate roles or permissions without sufficient validation or restrictions. This flaw enables an authenticated user with limited privileges to escalate their access rights by exploiting the unsafe delegation mechanism, potentially gaining higher-level administrative capabilities. The vulnerability does not require user interaction and can be exploited remotely over the network, though it requires the attacker to have some initial privileges (PR:L). The CVSS v3.1 base score of 5.4 reflects a medium severity, with confidentiality and integrity impacts rated as low but no impact on availability. No public exploits have been reported yet, but the risk remains significant for sites relying on this module for role management. The vulnerability underscores the risks of improper privilege assignment and the need for secure role delegation logic in content management systems like Drupal. Since the module controls critical access permissions, exploitation could lead to unauthorized content changes, configuration modifications, or further compromise of the Drupal installation.

The primary impact of CVE-2026-0945 is unauthorized privilege escalation within Drupal sites using the affected Role Delegation module versions. Attackers with limited authenticated access could gain elevated permissions, potentially allowing them to modify site content, change configurations, or manage user roles beyond their intended scope. This can lead to data integrity issues, unauthorized disclosure of sensitive information, and potential further exploitation of the site or connected systems. Although availability is not directly affected, the compromise of administrative privileges can result in significant operational disruption and loss of trust. Organizations relying on Drupal for public-facing websites, intranets, or web applications are at risk, especially if they do not restrict access to role delegation features or delay patching. The vulnerability could be leveraged in targeted attacks against organizations with valuable web assets or sensitive data managed via Drupal, increasing the risk of reputational damage and compliance violations.

To mitigate CVE-2026-0945, organizations should upgrade the Drupal Role Delegation module to version 1.5.0 or later as soon as the patch is available. Until then, restrict access to role delegation features strictly to trusted administrators and minimize the number of users with permissions to delegate roles. Implement strong authentication and authorization controls to limit the initial privileges required to exploit this vulnerability. Regularly audit user roles and permissions to detect any unauthorized changes. Employ web application firewalls (WAFs) to monitor and block suspicious requests targeting role delegation endpoints. Additionally, monitor Drupal security advisories and community updates for any emerging exploits or patches. Conduct thorough testing of role delegation workflows after updates to ensure no residual privilege escalation paths remain. Consider isolating critical Drupal administrative functions behind VPNs or IP whitelisting to reduce exposure.