CVE-2026-42481

Open CASCADE Technology OCCT V800rc5 contains multiple vulnerabilities in its IGES and STEP file parsers that can be triggered by crafted IGES or STEP files. These issues include an out-of-bounds read in Geom2dBSplineCurve::EvalD0 during IGES B-spline curve evaluation, an out-of-bounds read in...

CVE-2026-42479

An out-of-bounds read vulnerability in VrmlDataIndexedLineSet::TShape in the VRML parser in Open CASCADE Technology OCCT V800rc5 allows attackers to cause a denial of service via a crafted VRML file. The issue occurs because coordIndex values from parsed input are used as direct array indices...

PT-2026-36475

Two heap-based out-of-bounds read vulnerabilities in the STL ASCII file parser in Open CASCADE Technology OCCT V8 0 0 rc5 exist in RWStl Reader::ReadAscii because buffers returned by Standard ReadLineBuffer::ReadLine are not properly length-validated before strncasecmp or direct byte access...

PT-2026-36476

A heap-based out-of-bounds read vulnerability in RWObj Reader::read in the OBJ file parser in Open CASCADE Technology OCCT V8 0 0 rc5 allows user-assisted attackers to cause a denial of service or obtain sensitive information by persuading a victim to open a crafted OBJ file. The issue occurs...

CVE-2026-42476

Two heap-based out-of-bounds read vulnerabilities in the STL ASCII file parser in Open CASCADE Technology OCCT V800rc5 exist in RWStlReader::ReadAscii because buffers returned by StandardReadLineBuffer::ReadLine are not properly length-validated before strncasecmp or direct byte access...

CVE-2026-42479

An out-of-bounds read vulnerability in VrmlDataIndexedLineSet::TShape in the VRML parser in Open CASCADE Technology OCCT V800rc5 allows attackers to cause a denial of service via a crafted VRML file. The issue occurs because coordIndex values from parsed input are used as direct array indices...

CVE-2026-42478

An issue was discovered in VrmlDataIndexedFaceSet::TShape in the VRML V2.0 parser in Open CASCADE Technology OCCT V800rc5 allows attackers to cause a denial of service via a crafted VRML file. The issue occurs because malformed VRML input can trigger dereference of a corrupt or unvalidated pointe...

CVE-2026-42477

A heap-based out-of-bounds read vulnerability in RWObjReader::read in the OBJ file parser in Open CASCADE Technology OCCT V800rc5 allows user-assisted attackers to cause a denial of service or obtain sensitive information by persuading a victim to open a crafted OBJ file. The issue occurs because...