CVE-2019-10086 in Hyperion Planning
Summary
by MITRE
In Apache Commons Beanutils 1.9.2, a special BeanIntrospector class was added which allows suppressing the ability for an attacker to access the classloader via the class property available on all Java objects. We, however were not using this by default characteristic of the PropertyUtilsBean.
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Analysis
by VulDB Data Team • 01/11/2026
The vulnerability identified as CVE-2019-10086 resides within Apache Commons Beanutils version 1.9.2, representing a critical security flaw that exploits object property access mechanisms in Java applications. This vulnerability specifically targets the PropertyUtilsBean component which serves as the core engine for property access operations within the beanutils library. The flaw emerges from the library's default behavior of not utilizing a newly introduced security feature that was designed to prevent unauthorized access to classloaders through the class property accessible on all Java objects. The inclusion of the BeanIntrospector class in version 1.9.2 was intended to provide administrators with the capability to suppress access to sensitive classloader information, yet this security enhancement remained disabled by default within the library's standard configuration.
The technical exploitation of this vulnerability occurs when an attacker crafts malicious input that leverages the PropertyUtilsBean's property access mechanisms to traverse object hierarchies and ultimately access the classloader through the class property that exists on every Java object. This access pathway enables attackers to potentially load arbitrary classes, bypass security restrictions, and escalate privileges within applications that utilize the vulnerable beanutils library. The vulnerability operates at the core of Java's reflection and property access APIs, where the default configuration fails to enforce proper security boundaries that would normally prevent such unauthorized access patterns. This flaw aligns with CWE-20: Improper Input Validation and CWE-470: Use of Externally-Controlled Input to Determine the Target of a Resource Access Operation, as it allows attackers to manipulate object property access to achieve unintended resource access.
The operational impact of CVE-2019-10086 extends across numerous applications that depend on Apache Commons Beanutils for data binding, object manipulation, and property access operations. Applications vulnerable to this flaw include web frameworks, enterprise applications, and any system that processes user input through bean property access mechanisms. Attackers can exploit this vulnerability to perform remote code execution, escalate privileges, or gain unauthorized access to sensitive system resources. The vulnerability's severity is amplified because it affects widely used libraries and can be leveraged in conjunction with other attack vectors to compromise entire application stacks. This vulnerability directly maps to several ATT&CK techniques including T1059.007: Command and Scripting Interpreter: Python and T1068: Exploitation for Privilege Escalation, as it enables attackers to bypass security controls and gain elevated system access through the manipulation of Java object properties.
Organizations should immediately upgrade to Apache Commons Beanutils version 1.9.3 or later, which includes the proper implementation of the BeanIntrospector security measures. Additionally, administrators should review their application configurations to ensure that the security features are properly enabled and that property access operations are properly validated. The mitigation strategy should also include implementing proper input validation, restricting object property access in high-risk contexts, and monitoring for suspicious property access patterns. Security teams should also consider implementing application whitelisting, network segmentation, and runtime protection mechanisms to reduce the attack surface and limit the potential impact of successful exploitation attempts.