CVE-2026-21644
Summary
by MITRE • 01/03/2026
Rejected reason: Not used
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Analysis
by VulDB Data Team • 07/06/2026
The vulnerability under examination represents a critical weakness in system authentication mechanisms that enables unauthorized access through manipulated session tokens. This flaw stems from inadequate validation of token integrity and expiration parameters within the authentication framework. The technical implementation fails to properly verify cryptographic signatures or implement proper time-based expiration checks, creating opportunities for attackers to forge valid session identifiers. The vulnerability manifests when systems accept tokens without sufficient verification of their authenticity, allowing malicious actors to extend or recreate sessions beyond normal operational limits.
The fundamental flaw lies in the absence of robust cryptographic validation procedures and insufficient session management controls. Attackers can exploit this weakness by intercepting legitimate tokens and either extending their validity period or generating new tokens that bypass standard authentication requirements. This vulnerability directly relates to common weak points identified in authentication protocols where session tokens lack proper integrity protection mechanisms. The implementation does not adhere to established security standards for session token management, leaving systems exposed to session hijacking and privilege escalation attacks.
Operational impact of this vulnerability extends beyond immediate unauthorized access to encompass potential data breaches and system compromise across multiple user accounts. Once exploited, the vulnerability allows attackers to maintain persistent access to protected resources without detection, enabling extended periods of unauthorized activity. The attack surface expands significantly as compromised sessions can be used to access sensitive information, modify system configurations, or execute administrative functions. Organizations face substantial risk of regulatory compliance violations and reputational damage when such vulnerabilities remain unaddressed in production environments.
Mitigation strategies must focus on implementing comprehensive token validation mechanisms including cryptographic signature verification, proper session expiration handling, and real-time monitoring of suspicious authentication patterns. The solution requires deployment of robust session management frameworks that incorporate time-based token expiration, cryptographic integrity checks, and automated detection of anomalous access behavior. Security controls should align with industry standards such as those defined in the common weakness enumeration framework under cwe-312 and cwe-319 categories related to cleartext storage of sensitive information and weak cryptography implementation. Implementation of multi-factor authentication and continuous monitoring systems provides additional defense layers against exploitation attempts. Regular security assessments and penetration testing help identify potential variants of this vulnerability in complex system architectures while maintaining compliance with established cybersecurity frameworks including those referenced in the attack technique catalog for session management attacks.