A significant security flaw has been identified in the Drupal Flag attendance field module, impacting users who have deployed this specific functionality on their Drupal websites. This vulnerability, tracked as CVE-2026-55809, involves an “Improperly Controlled Modification of Dynamically-Determined Object Attributes” which can lead to “Object Injection.” In simple terms, this means an attacker could potentially manipulate how the system handles certain data, tricking it into executing harmful code or altering data unexpectedly.
Object injection vulnerabilities are particularly dangerous because they can allow unauthorized users to perform actions they shouldn’t be able to, such as gaining control over the application, accessing sensitive information, or even executing malicious code on the server. For Drupal sites using the affected module, this could pose a serious risk to data integrity and overall system security.
CVE Details
Product: Drupal Flag attendance field
Published Date: July 10, 2026
Severity: High (CVSS Score 8.1)
Status: Analyzed
Affected Products
The vulnerability specifically affects the Drupal Flag attendance field module. Users running versions from 0.0.0 up to and including 1.2 are at risk. If your Drupal installation utilizes this module within this version range, it is crucial to take action.
Current Status
As of its last modification date on July 14, 2026, this vulnerability is classified as “Analyzed.” This status indicates that the vulnerability has been confirmed and understood by security researchers and the vendor. It means that the details are known, and the focus will now shift towards developing and deploying effective solutions.
Severity Level
This vulnerability carries a “High” severity rating, with a CVSS Score of 8.1. A high severity rating indicates that the flaw is easy to exploit and could lead to significant damage. In the case of object injection, this often translates to potential for remote code execution, which grants an attacker full control over the affected system. It could also lead to unauthorized data access, modification, or even complete denial of service for the website. Website administrators and developers should treat this vulnerability with urgency.
Possible Solutions
Given the high severity of this object injection vulnerability, it is imperative for all users of the Drupal Flag attendance field module within the affected version range (0.0.0 to 1.2) to update their installations immediately. While specific patch details were not directly accessible, the standard recommendation for Drupal vulnerabilities is to:
- Update to a patched version: Regularly check the official Drupal.org security advisories or the module’s project page for an updated version that addresses this vulnerability. Typically, a version higher than the last affected one (e.g., version 1.3 or later, if released) would contain the fix.
- Disable the module: If an immediate update is not feasible, consider temporarily disabling the Flag attendance field module to mitigate the risk until a proper patch can be applied.
- Review code if custom implementations exist: For developers, reviewing any custom code that interacts with the Flag attendance field module for potential object handling vulnerabilities is a good practice.
Always ensure your Drupal core and all contributed modules are kept up-to-date to protect against known security flaws.
References
https://www.drupal.org/sa-contrib-2026-049
