Medium
opencascade — security advisory
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.
- Products
- opencascade
- Affected versions
- 7.3.3+dfsg1-1, 7.3.3+dfsg1-1build1, 7.5.1+dfsg1-2, 7.5.1+dfsg1-2ubuntu1, 7.6.3+dfsg1-7, 7.6.3+dfsg1-7.1, 7.6.3+dfsg1-7.1build1, 7.8.1+dfsg1-3, 7.9.2+dfsg-2, 7.9.2+dfsg-3, 7.9.2+dfsg-4, 7.9.2+dfsg-4build1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-42481
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:03 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-42481
opencascade
Fixed versions: Not specified
opencascade
Fixed versions: Not specified
opencascade
Fixed versions: Not specified
opencascade
Fixed versions: Not specified
opencascade
Fixed versions: Not specified
opencascade
Fixed versions: Not specified
Complete source record
{
"id": "6f2540b97582b436bc402697e5e9b196f855ef99ab7e9360dcd1a1fdb95e6911",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-42481",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-42481",
"summary": "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.",
"evidence": "osv:UBUNTU-CVE-2026-42481",
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],
"modified": "2026-10-17T13:00:05.184685721Z",
"provider": "osv",
"upstream": [
"CVE-2026-42481"
],
"references": [
"https://ubuntu.com/security/CVE-2026-42481",
"https://www.cve.org/CVERecord?id=CVE-2026-42481",
"https://gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94a"
]
},
"related_cves": [
{
"value": "CVE-2026-42481",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 360291,
"published_at": "2026-05-01T16:16:00+00:00"
}