CVE-2025-59952: minio minio-java Improper Input Validation

Vulnerability summary

CVE-2025-59952 is a high (CVSS 8.7) Improper Input Validation vulnerability in minio minio-java. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 41.2% of scored vulnerabilities.

Timeline

1. 29-09-2025
   PublishedVulnerability first disclosed.
2. 23-01-2026
   Last modifiedVulnerability information updated.

Description

MinIO Java SDK is a Simple Storage Service (aka S3) client to perform bucket and object operations to any Amazon S3 compatible object storage service. In minio-java versions prior to 8.6.0, XML tag values containing references to system properties or environment variables were automatically substituted with their actual values during processing. This unintended behavior could lead to the exposure of sensitive information, including credentials, file paths, or system configuration details, if such references were present in XML content from untrusted sources. This is fixed in version 8.6.0.

• CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
• CWE-94Improper Control of Generation of Code ('Code Injection')The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.