CVE-2026-66773 in Python-Pyodata
Summary
by MITRE • 08/11/2026
A malicious or compromised OData service could disclose sensitive authentication information and inject untrusted data into the application, which may leads to a high impact on confidentiality and low impact on integrity and no impact on Availability.
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Analysis
by VulDB Data Team • 08/11/2026
OData services represent a critical component in modern enterprise applications, providing standardized mechanisms for data access and manipulation through web protocols. When an OData service becomes compromised or is controlled by malicious actors, it creates a severe security vulnerability that can lead to widespread data exposure and system compromise. This vulnerability stems from the fundamental design principle of OData services which expose data endpoints that can be queried using standardized protocols, making them attractive targets for attackers seeking to exploit misconfigurations or implementation flaws.
The technical flaw manifests when an attacker gains control over an OData service endpoint or when the service itself is improperly configured to handle authentication credentials. This typically occurs through insufficient input validation, lack of proper access controls, or insecure data handling mechanisms within the OData implementation. The vulnerability allows for unauthorized disclosure of sensitive authentication information such as user credentials, session tokens, and other privileged data that should remain protected. Additionally, attackers can inject untrusted data into the application through crafted OData queries that exploit weaknesses in data validation and sanitization processes.
The operational impact of this vulnerability is substantial, particularly concerning confidentiality as it directly enables unauthorized access to sensitive organizational data. Attackers can leverage compromised OData services to perform data exfiltration operations, gain insights into internal systems, and potentially escalate privileges within the application environment. The low impact on integrity suggests that while attackers cannot directly modify critical system data through this vector, they may still be able to manipulate application behavior through data injection techniques. Availability remains unaffected as the primary attack vector focuses on data access rather than service disruption.
Security professionals should implement comprehensive monitoring of OData service endpoints, establish strict input validation controls, and enforce robust access control mechanisms. The vulnerability aligns with CWE-20 for Improper Input Validation and CWE-79 for Cross-site Scripting, while also mapping to ATT&CK techniques involving credential access and data manipulation. Organizations must conduct regular security assessments of their OData implementations, ensure proper authentication mechanisms are in place, and implement network segmentation to limit potential attack surface exposure. Proper logging and audit controls should be deployed to detect unauthorized access attempts and data exfiltration activities targeting OData services.