CVE-2026-112855 in Redy Plugin
Summary
by MITRE • 10/23/2026
Deserialization of Untrusted Data vulnerability in axiomthemes Redy redy allows Object Injection.This issue affects Redy: from n/a through 1.3.5.
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Analysis
by VulDB Data Team • 10/24/2026
The identified security flaw represents a critical deserialization of untrusted data vulnerability within the Redy application developed by AxiomThemes, specifically affecting versions ranging from initial releases up to version 1.3.5. This category of vulnerability is fundamentally rooted in the improper handling of serialized objects during input processing. When an application accepts user-supplied or externally sourced data and deserializes it without adequate validation or sanitization, it creates a pathway for attackers to inject malicious object structures into the system's memory space. In this specific instance, the flaw manifests as Object Injection, which allows an attacker to manipulate the internal state of the application by controlling the properties and methods invoked during the deserialization process. This is not merely a data corruption issue but a mechanism that can lead to arbitrary code execution if the injected objects interact with dangerous classes or functions available within the Java runtime environment or other supported platforms.
From a technical perspective, this vulnerability aligns closely with Common Weakness Enumeration identifier CWE-502, which describes Deserialization of Untrusted Data. The core issue lies in the application's failure to implement strict type checking and allow-listing mechanisms for serialized payloads. Instead of validating that incoming data conforms to expected schemas or types, Redy appears to blindly reconstruct objects based on the provided input stream. This lack of integrity verification enables an attacker to craft a specially formatted payload containing malicious classes. When these classes are instantiated by the vulnerable deserialization routine, they can execute arbitrary commands, access sensitive files, or escalate privileges within the context of the running application process. The severity is compounded by the fact that such attacks often bypass traditional network security controls because the malicious activity occurs entirely within the application layer after authentication and initial request validation have taken place.
The operational impact of this vulnerability is severe and multifaceted. Successful exploitation can result in a complete compromise of the underlying system hosting Redy. Attackers may achieve remote code execution, leading to unauthorized access to confidential data stored by the application or its database. Furthermore, the ability to inject objects allows for potential denial-of-service conditions if malicious logic causes resource exhaustion or infinite loops within the server process. In enterprise environments where Redy might be integrated with other services, this vulnerability could serve as a pivot point for lateral movement across the network. The attacker gains a foothold that can be leveraged to exfiltrate sensitive information, modify application configurations, or install persistent backdoors. Given that the issue affects versions up through 1.3.5, any deployment utilizing these older iterations remains exposed to this risk until remediation is applied.
This vulnerability maps directly to several techniques within the MITRE ATT&CK framework, particularly those associated with Initial Access and Execution phases. It corresponds to CWE-94 Improper Control of Generation of Code (Code Injection) when considering the potential for code execution via object methods. In terms of attack patterns, it aligns with T1059 Command and Scripting Interpreter if the injected objects trigger system commands, or more broadly under Defense Evasion techniques that involve manipulating application logic to bypass security controls. The exploitation typically involves crafting a serialized payload using tools like ysoserial, which generates payloads for various Java libraries known to be vulnerable during deserialization. These payloads exploit gadget chains within common dependencies used by the framework, turning benign library functions into vectors for malicious execution.
To mitigate this vulnerability, immediate action is required to update Redy to version 1.3.6 or later where the issue has been resolved. If an upgrade is not immediately feasible, organizations should implement strict input validation and sanitization strategies at all entry points that handle serialized data. This includes enforcing allow-lists for expected object types and rejecting any deserialization attempts involving unexpected classes. Additionally, deploying Web Application Firewalls with specific rules to detect known malicious serialization patterns can provide a layer of defense in depth. It is also advisable to disable unnecessary features or libraries that are not required by the application but may contain vulnerable gadget chains. Regular security assessments and code reviews focusing on data handling practices will help prevent similar issues from arising in future development cycles, ensuring robust protection against deserialization-based attacks.