CVE-2026-4219 in YWF BPOF APGCS App
Summary
by MITRE • 03/16/2026
A flaw has been found in INDEX Conferences & Exhibitions Organization YWF BPOF APGCS App up to 1.0.2 on Android. Affected by this vulnerability is an unknown functionality of the file com/index/event/BuildConfig.java of the component ae.index.apgcs. Executing a manipulation of the argument ACCESS_KEY/HASH_KEY can lead to hard-coded credentials. The attack is restricted to local execution. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 05/09/2026
This vulnerability resides within the INDEX Conferences & Exhibitions Organization YWF BPOF APGCS Android application version 1.0.2 and earlier, representing a critical security flaw in the application's credential management system. The vulnerability is located in the BuildConfig.java file within the ae.index.apgcs component, specifically affecting the ACCESS_KEY and HASH_KEY parameters that are hardcoded within the application's source code. This represents a classic example of insecure credential storage that violates fundamental security principles and creates persistent exposure points for attackers who can access the application's local environment. The flaw constitutes a direct violation of CWE-798, which addresses the use of hardcoded credentials, and aligns with ATT&CK technique T1552.001 for credentials in files, demonstrating how hardcoded secrets can be extracted through local access to the device.
The technical implementation of this vulnerability stems from the application's design decision to embed sensitive authentication parameters directly within the source code during compilation rather than implementing proper secure credential management practices. When the ACCESS_KEY and HASH_KEY values are hardcoded in the BuildConfig.java file, they become permanently embedded within the application binary, making them accessible to any attacker with local execution privileges on the device. This local execution requirement limits the attack surface but does not eliminate the risk, as attackers can potentially exploit device compromise through various attack vectors including malicious applications, compromised device rooting, or physical access to the device. The vulnerability's exploitation pathway involves manipulating these hardcoded credentials through local application manipulation, which can lead to unauthorized access to backend systems and potentially escalate to broader network compromise.
The operational impact of this vulnerability extends beyond simple credential exposure, as it creates persistent access points that can be leveraged for unauthorized data access, service abuse, and potential lateral movement within network environments. Attackers who gain local access to the device can extract these hardcoded credentials and use them to authenticate against the application's backend services, potentially gaining access to sensitive conference data, user information, or organizational resources. The fact that the exploit has been published and may be used indicates that threat actors are actively exploiting this weakness, making it a high-priority remediation target. The vulnerability's persistence across application versions and the lack of vendor response further compounds the risk, as organizations using this application remain exposed to potential credential theft and unauthorized access without vendor-provided security updates or patches.
Organizations should immediately implement mitigations including removing hardcoded credentials from the application source code and implementing secure credential management practices such as dynamic credential retrieval, secure key management services, and proper application sandboxing. The application should be updated to eliminate hardcoded credentials and implement proper authentication mechanisms that do not rely on static keys embedded within the application binary. Security teams should also monitor for unauthorized access attempts and implement device security controls to prevent local exploitation. Additionally, organizations should consider implementing network-based monitoring to detect unauthorized access attempts using these credentials and ensure that any sensitive data access is properly logged and audited. The vulnerability represents a fundamental architectural flaw that requires complete redesign of the credential management system rather than simple patching approaches, as the hardcoded nature of the credentials means that any update would require complete application redeployment to ensure security.