docx4j: Stack Overflow via Cyclic `w:basedOn` Style Chain leads to Denial of Service
docx4j's PropertyResolver and several adjacent helpers recursively walk the OpenXML style inheritance chain (w:basedOn) without cycle detection. A WordprocessingML document containing a cyclic style chain (for example, Style A based on B and Style B based on A) causes unbounded recursion and a java.lang.StackOverflowError within the property-resolution code path. These helpers are used by operations that require effective style resolution, including common conversion and TOC-related paths. As a result, most …