CVE-2024-6423 in API Manager
Summary
by MITRE • 10/21/2026
The product failed to enforce validation constraints on user-supplied input in URL parameters, allowing sensitive data to be passed to flows where it was not intended to be processed. Although the product did not utilize this data, its acceptance could lead to logging.
If a user mistakenly sends sensitive data via URL parameters to any flow, this data could be inadvertently logged in access logs. This has the potential to expose confidential information, compromising the security and privacy of affected systems if the product is used incorrectly.
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Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability stems from an insufficient validation mechanism within the application's input handling logic, specifically concerning URL parameters. In a secure architecture, all user-supplied data entering through query strings or path segments must undergo rigorous sanitization and type checking before being processed by downstream components. However, in this instance, the product accepts arbitrary values passed via URL parameters without enforcing strict validation constraints against expected formats, lengths, or character sets. This lack of enforcement creates a pathway for unexpected data to enter internal processing flows where it is not intended to be handled, violating the principle of least privilege and proper input validation standards defined by CWE-20 Improper Input Validation.
The operational impact of this flaw centers on the potential for sensitive information leakage through side channels rather than direct exploitation or code execution. Although the application logic does not actively utilize these unvalidated parameters in critical business processes, their mere acceptance triggers logging mechanisms inherent to web servers and application frameworks. When a user inadvertently or maliciously includes confidential data such as authentication tokens, personally identifiable information, or proprietary keys within URL parameters, this content is written directly into access logs. This behavior aligns with CWE-209 Generation of Error Message Containing Sensitive Information, where the system's response mechanisms expose details that should remain internal and protected from external observation.
The security implications are significant because web server access logs are often accessible to a broader range of personnel or stored in centralized logging systems with less stringent access controls than application-specific data stores. If an attacker can induce a victim user to click a crafted link containing sensitive payloads, the resulting log entries may capture these secrets. Furthermore, if the system is misconfigured and users routinely pass sensitive data via URLs due to poor development practices, every such request contributes to a growing repository of exposed credentials or private data in plaintext format within log files. This scenario highlights the risk associated with CWE-798 Use of Hard-coded Credentials when combined with improper input handling, as it facilitates credential harvesting through passive observation rather than active intrusion.
To mitigate this vulnerability, developers must implement strict validation rules for all URL parameters at the earliest possible point in the request lifecycle. Input should be validated against a whitelist of allowed characters and formats, rejecting any data that does not conform to expected patterns before it reaches logging subsystems or business logic. Additionally, sensitive information such as session tokens, API keys, and passwords must never be transmitted via URL parameters due to their visibility in browser history, proxy logs, and server access logs; instead, they should be passed using HTTP headers or POST request bodies with appropriate security flags like HttpOnly and Secure attributes on cookies. Implementing Web Application Firewall rules that detect and block requests containing known sensitive data patterns in query strings can also provide an additional layer of defense against accidental exposure.