CVE-2025-30065 is a critical deserialization vulnerability (CWE-502) found in the parquet-avro module of Apache Parquet Java versions 1.15.0 and earlier. The vulnerability arises from unsafe schema parsing that allows attackers to supply maliciously crafted data, leading to arbitrary code execution without requiring authentication or user interaction. This flaw exploits the deserialization process, a common attack vector where untrusted input is converted into executable objects, potentially allowing attackers to run malicious code on affected systems. The vulnerability has a CVSS 4.0 score of 10.0, reflecting its ease of exploitation (network vector, no privileges required, no user interaction) and its severe impact on confidentiality, integrity, and availability. Apache Parquet is widely used in big data ecosystems for efficient columnar storage, often integrated with Apache Hadoop, Spark, and cloud data platforms. The flaw could allow attackers to compromise data processing nodes, execute arbitrary commands, and potentially move laterally within enterprise environments. The Apache Software Foundation has addressed this issue in version 1.15.1, urging users to upgrade immediately. No public exploits have been reported yet, but the vulnerability's nature and severity make it a prime target for attackers once weaponized.

The impact of CVE-2025-30065 is severe for organizations worldwide that utilize Apache Parquet for big data storage and processing. Successful exploitation can lead to full system compromise, allowing attackers to execute arbitrary code remotely, which threatens confidentiality by exposing sensitive data, integrity by altering or corrupting data, and availability by disrupting data processing workflows. Enterprises relying on data analytics, cloud services, and data lakes are particularly vulnerable, as attackers could leverage this vulnerability to infiltrate critical infrastructure, deploy ransomware, or exfiltrate intellectual property. The lack of required authentication and user interaction lowers the barrier for exploitation, increasing the risk of widespread attacks. Additionally, compromised nodes in distributed data environments can facilitate lateral movement, escalating the severity of breaches. The vulnerability also poses risks to cloud service providers and managed service environments that offer Apache Parquet-based solutions, potentially affecting multiple tenants.

To mitigate CVE-2025-30065, organizations should immediately upgrade all Apache Parquet Java deployments to version 1.15.1 or later, which contains the security fix. In addition to patching, implement strict input validation and sanitization on all data sources feeding into Parquet processing pipelines to reduce the risk of malicious schema injection. Employ network segmentation and least privilege principles to limit access to systems running Apache Parquet, minimizing potential attack surfaces. Monitor logs and network traffic for anomalous activity indicative of exploitation attempts, such as unexpected schema parsing errors or unusual process executions. Consider deploying runtime application self-protection (RASP) or endpoint detection and response (EDR) solutions to detect and block suspicious behaviors related to deserialization attacks. For cloud environments, ensure that data ingestion pipelines are secured and that access controls prevent unauthorized data uploads. Regularly review and update security policies related to big data processing frameworks to incorporate lessons learned from this vulnerability.