CVE-2025-48988 identifies a resource allocation vulnerability in Apache Tomcat that enables denial of service attacks through uncontrolled multipart upload processing without proper limits or throttling mechanisms. This vulnerability affects Apache Tomcat versions 11.0.0-M1 through 11.0.7, 10.1.0-M1 through 10.1.41, and 9.0.0.M1 through 9.0.105, achieving a CVSS score of 7.5 (High severity) with an EPSS score of 39.8 percentile and 0.2% exploitation probability, indicating significant risk for web applications handling multipart file uploads. The vulnerability details reveal that insufficient resource controls in the multipart request parsing mechanism allow attackers to exhaust server resources by sending crafted requests with excessive numbers of parts or oversized part headers, leading to service degradation or complete unavailability. This creates substantial exploit risk for Apache Tomcat deployments that accept file uploads or process multipart form data, particularly affecting web applications with file upload functionality, content management systems, and enterprise applications that handle user-submitted multipart content without proper resource limitations. The technical root cause lies in Apache Tomcat's org.apache.catalina.connector.Request.parseParts() method, where inadequate limits on part count and part header sizes enable resource exhaustion attacks, classified as CWE-770 (Allocation of Resources Without Limits or Throttling), creating a vector for known exploited vulnerabilities targeting web server resource management. The vulnerability specifically affects the interaction between multipart request processing and resource allocation, where the parseParts method previously relied on indirect limits tied to maxParameterCount without explicit controls for maxPartCount and maxPartHeaderSize parameters. The fix introduces two new configuration parameters in org.apache.catalina.connector.Connector to provide fine-grained control over multipart processing resources, implementing proper throttling through FileUpload.setFileCountMax() and FileUpload.setPartHeaderSizeMax() methods. Mitigation strategies require upgrading to patched Apache Tomcat versions 11.0.8, 10.1.42, or 9.0.106 and later, which implement proper resource limits for multipart upload processing and prevent resource exhaustion attacks through improved configuration controls. Organizations should prioritize identifying all Tomcat installations that handle multipart uploads, implement proper monitoring for unusual multipart request patterns that may indicate DoS attempts, configure appropriate limits for file upload operations to prevent resource exhaustion, and maintain updated CVE database records to track similar resource allocation vulnerabilities that could compromise web server availability through uncontrolled resource consumption and denial of service attacks in multipart request processing systems.