Insufficient Documentation Vulnerability in Apache Tomcat by Apache

CVE-2026-59084

What is CVE-2026-59084?

CVE-2026-59084 is a vulnerability in Apache Tomcat, a widely used open-source web server and servlet container that implements the Java Servlet and JavaServer Pages (JSP) specifications. This vulnerability specifically relates to insufficient technical documentation affecting the EncryptInterceptor component. The lack of clear instructions on securely configuring this interceptor poses a risk to organizations that rely on Apache Tomcat for their web applications. If not properly configured, the EncryptInterceptor may compromise data integrity and confidentiality, potentially exposing sensitive information to unauthorized access or manipulation.

Apache Tomcat versions ranging from 11.0.0-M1 through 11.0.23, 10.1.0-M1 through 10.1.56, and several others, including versions that have reached end of support, are affected. Given the widespread use of Apache Tomcat in enterprise environments, this vulnerability could negatively impact many organizations that depend on it for hosting their applications and services.

Potential impact of CVE-2026-59084

1. Data Breaches: The insufficient documentation regarding the EncryptInterceptor could lead to misconfigurations that fail to protect sensitive data. This vulnerability can result in unauthorized access to confidential information, thereby increasing the risk of data breaches.

2. Operational Disruption: Organizations relying on Apache Tomcat for their web services might face operational challenges if the vulnerability is exploited. Attackers could manipulate data or disrupt services, leading to downtime and potential financial losses.

3. Regulatory Compliance Risks: Companies that handle sensitive data may face regulatory compliance issues if they are found to be using vulnerable software. The exploitation of this vulnerability could lead to penalties or fines, particularly if sensitive information is exposed or mishandled due to improper configurations.

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