CVE-2026-47300 in NET
Summary
by MITRE • 07/14/2026
Incorrect implementation of authentication algorithm in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
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Analysis
by VulDB Data Team • 07/14/2026
This vulnerability represents a critical flaw in the authentication mechanism of asp net core applications where improper implementation of authentication algorithms creates opportunities for privilege escalation attacks. The weakness typically manifests when the application fails to properly validate authentication tokens or credentials, allowing an attacker who has already gained some level of access to manipulate the authentication process and gain elevated privileges within the system. Such implementations often suffer from insufficient input validation, weak cryptographic practices, or flawed session management that can be exploited through various attack vectors including token manipulation, replay attacks, or credential stuffing techniques.
The technical nature of this vulnerability aligns with common weakness enumerations such as cwe 305 authentication bypass and cwe 798 use of hard-coded credentials. Attackers can leverage these flaws to perform unauthorized privilege escalation by exploiting the flawed authentication logic that fails to properly verify user identities or validate access controls. The operational impact extends beyond simple unauthorized access, potentially allowing attackers to move laterally within networks, access sensitive data, modify system configurations, or even take complete control of affected systems. This type of vulnerability is particularly dangerous in enterprise environments where asp net core applications often serve as critical backend services handling user authentication and authorization for multiple business processes.
The attack surface for this vulnerability typically includes web applications that utilize asp net core identity management, api endpoints requiring authentication, and any service that relies on proper credential validation for access control. Attackers may employ techniques such as jwt token manipulation, session hijacking, or exploiting weak cryptographic implementations to bypass authentication checks. The exploitability of such vulnerabilities often depends on the specific implementation details and the presence of additional security controls within the application architecture. Organizations should consider implementing comprehensive monitoring solutions that can detect abnormal authentication patterns and unauthorized privilege escalation attempts.
Mitigation strategies must address both immediate remediation and long-term architectural improvements to prevent recurrence of similar issues. Security patches and updates should be applied promptly to address known vulnerabilities in asp net core frameworks, while developers must implement proper authentication validation mechanisms including robust token handling, secure session management, and thorough input sanitization. Organizations should also establish secure coding practices that align with industry standards such as the owasp top ten and mitre att&ck framework, particularly focusing on authentication and access control categories. Regular security assessments, including penetration testing and code reviews specifically targeting authentication flows, help identify potential weaknesses before they can be exploited by malicious actors. Additionally implementing multi-factor authentication, proper logging and monitoring of authentication events, and maintaining up-to-date threat intelligence about emerging attack patterns provides defense in depth against privilege escalation attempts targeting asp net core applications.