CVE-2026-107049 in Forkyz
Summary
by MITRE • 10/29/2026
An issue in Forkyz versionCode 8500000 allows attackers to arbitrarily change another user's storage settings via supplying a crafted URI string.
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Analysis
by VulDB Data Team • 10/29/2026
The vulnerability identified in Forkyz, specifically within application build or version code 8500000, represents a critical flaw in the handling of Uniform Resource Identifier (URI) inputs related to user configuration management. This issue stems from an insufficient validation mechanism when processing external URI strings that are intended to modify storage settings for users other than the one currently interacting with the application. The core technical deficiency lies in the lack of proper authorization checks and input sanitization, allowing a malicious actor to inject crafted URIs that bypass standard access controls. By exploiting this weakness, an attacker can manipulate the internal state of another user's account without requiring valid authentication credentials for that target account, effectively achieving unauthorized privilege escalation through configuration manipulation rather than direct code execution or data exfiltration.
From a technical perspective, this vulnerability aligns with CWE-284 Improper Access Control and CWE-798 Use of Hard-coded Credentials if the URI parsing logic relies on implicit trust in external inputs without verifying the source's legitimacy. The attack vector typically involves social engineering or cross-site request forgery techniques where the victim is tricked into triggering a malicious link or action that sends the crafted URI to the application backend. Once received, the application processes this input and applies the specified storage settings changes to the target user profile associated with the session context or account ID embedded within the payload. This bypasses standard security boundaries because the system fails to verify whether the requesting entity has administrative privileges or explicit permission to alter configurations for other users.
The operational impact of this vulnerability is significant, as it compromises the integrity and confidentiality of user data by allowing unauthorized modifications to storage settings. These settings may dictate how files are stored, accessed, or synchronized across devices, potentially leading to data leakage if an attacker configures the victim's device to upload sensitive information to a malicious server. Furthermore, altering storage paths can disrupt application functionality for legitimate users, causing denial of service conditions where applications fail to locate required resources due to redirected or invalid file system pointers. In enterprise environments, this could facilitate lateral movement by compromising user accounts and gaining footholds in connected systems that rely on these configurations for secure data handling protocols.
Mitigation strategies must focus on implementing robust input validation and strict access control mechanisms. Developers should enforce the principle of least privilege, ensuring that API endpoints responsible for modifying storage settings verify that the authenticated user has explicit permission to alter configurations for their own account only. Input sanitization routines must be strengthened to reject malformed or unexpected URI structures, particularly those containing parameters intended for cross-user operations. Additionally, implementing multi-factor authentication and session management best practices can reduce the risk of successful exploitation via social engineering vectors. Regular security audits and penetration testing should be conducted to identify similar flaws in other configuration-managing components within the application architecture.
This vulnerability is also relevant to MITRE ATT&CK framework techniques such as T1078 Valid Accounts, where attackers leverage legitimate credentials or impersonate users to gain access, and T1562 Impair Defenses by modifying system configurations to hinder detection or security controls. Addressing this issue requires a comprehensive review of the application's authentication and authorization logic, ensuring that all state-changing operations are properly scoped to the requesting user identity. By correcting these flaws, Forkyz can restore trust in its data handling processes and prevent attackers from exploiting configuration management features for malicious purposes.