Medium severity5.5NVD Advisory· Published May 1, 2026· Updated Jun 1, 2026
CVE-2026-42481
CVE-2026-42481
Description
Open CASCADE Technology (OCCT) V8_0_0_rc5 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 Geom2d_BSplineCurve::EvalD0 during IGES B-spline curve evaluation, an out-of-bounds read in MakeBSplineCurveCommon during STEP B-spline curve construction, and infinite recursion in StepShape_OrientedEdge::EdgeStart when processing a self-referential OrientedEdge entity. Successful exploitation may result in denial of service or unintended memory disclosure.
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Affected products
8cpe:2.3:a:opencascade:open_cascade_technology:*:*:*:*:*:*:*:*+ 7 more
- cpe:2.3:a:opencascade:open_cascade_technology:*:*:*:*:*:*:*:*range: <=7.9.3
- cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:beta1:*:*:*:*:*:*
- cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:rc2:*:*:*:*:*:*
- cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:rc3:*:*:*:*:*:*
- cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:rc4:*:*:*:*:*:*
- cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:rc5:*:*:*:*:*:*
- (no CPE)range: = V8_0_0_rc5
Patches
Vulnerability mechanics
References
1- gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94anvdThird Party Advisory
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