A heap-based out-of-bounds read vulnerability affects Open CASCADE Technology (OCCT) V8_0_0_rc5 in the OBJ file parser component RWObj_Reader::read. The vulnerability allows user-assisted attackers to cause denial of service or obtain sensitive information by convincing victims to open specially crafted OBJ files. The issue stems from improper buffer length validation where Standard_ReadLineBuffer::ReadLine() can return a 1-byte buffer but RWObj_Reader::read() calls pushIndices(aLine + 2) without checking buffer boundaries. This creates a memory safety issue that could lead to information disclosure or system crashes.