CVE-2026-55809 in Flag attendance field
Summary
by MITRE • 07/11/2026
Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Drupal Flag attendance field allows Object Injection. This issue affects Flag attendance field versions: from 0.0.0 to 1.2.
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Analysis
by VulDB Data Team • 07/11/2026
The improperly controlled modification of dynamically-determined object attributes vulnerability in Drupal Flag attendance field represents a critical security flaw that enables object injection attacks through manipulated field configurations. This vulnerability specifically targets the Flag module's attendance field functionality, where user-controlled input directly influences object attribute modifications during runtime execution. The issue stems from insufficient validation and sanitization of dynamic field parameters that are processed by the system, creating opportunities for malicious actors to inject arbitrary objects into the application's memory space.
The technical implementation of this vulnerability occurs when the Flag module processes attendance field data without proper input validation mechanisms. Attackers can manipulate field attribute values to influence how objects are instantiated or modified within the Drupal environment, potentially leading to unauthorized code execution or data manipulation. This flaw operates at the intersection of dynamic object creation and insecure parameter handling, where the system's failure to properly control attribute modifications allows for injection of malicious payloads through carefully crafted input sequences.
The operational impact of this vulnerability extends beyond simple data corruption, as it can enable attackers to escalate privileges within the Drupal environment or gain unauthorized access to sensitive information. When exploited successfully, the object injection mechanism can allow adversaries to manipulate core system objects, potentially compromising the integrity of the entire content management platform. The vulnerability affects all versions from 0.0.0 to 1.2, indicating a long-standing issue that has persisted across multiple releases without adequate mitigation measures.
Security professionals should recognize this vulnerability as a variant of CWE-94, which describes improper control of generation of code, and aligns with ATT&CK techniques related to code injection and privilege escalation. The flaw demonstrates characteristics consistent with object-oriented programming vulnerabilities where dynamic attribute assignment lacks proper access controls and input validation, making it particularly dangerous in web applications that rely heavily on user-generated content processing.
Mitigation strategies for this vulnerability should include immediate patching of affected Flag module versions, implementation of strict input validation for all field attributes, and comprehensive review of dynamic object creation processes within Drupal installations. Organizations should also consider implementing web application firewalls to monitor for suspicious attribute modification patterns and establish regular security audits focusing on object handling mechanisms. Additionally, developers should adopt defensive programming practices that enforce strict type checking and sanitize all user-supplied data before processing, particularly in areas where runtime object instantiation occurs. The vulnerability serves as a reminder of the critical importance of validating dynamic parameters in web applications and implementing proper access controls around object attribute modifications to prevent exploitation by malicious actors seeking to compromise system integrity.