{"id":"CVE-2026-42481","aliases":["DEBIAN-CVE-2026-42481","EUVD-2026-26678","GHSA-8wqm-37mp-6rrm","UBUNTU-CVE-2026-42481"],"status":"published","title":"Open CASCADE Technology (OCCT) V8_0_0_rc5 contains multiple vulnerabilities in its IGES and STEP...","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.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.00098,"percentile":0.00767,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2026-05-01T00:00:00Z","modified":"2026-11-08T16:10:00Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"opencascade","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.6.3+dfsg1-7","7.6.3+dfsg1-7.1","7.7.1+dfsg1-1~exp1","7.7.1+dfsg1-1~exp2","7.8.1+dfsg1-1","7.8.1+dfsg1-1~exp1","7.8.1+dfsg1-2","7.8.1+dfsg1-3","7.8.1+dfsg1-4~exp1","7.8.1+dfsg1-5","7.8.1+dfsg1-6","7.8.1+dfsg1-7","7.9.1+dfsg-1~exp1","7.9.1+dfsg-1~exp2","7.9.2+dfsg-1","7.9.2+dfsg-2","7.9.2+dfsg-3","7.9.2+dfsg-4","7.9.2+dfsg-5"]},{"source":"osv","ecosystem":"Debian:13","package":"opencascade","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.8.1+dfsg1-3","7.8.1+dfsg1-4~exp1","7.8.1+dfsg1-5","7.8.1+dfsg1-6","7.8.1+dfsg1-7","7.9.1+dfsg-1~exp1","7.9.1+dfsg-1~exp2","7.9.2+dfsg-1","7.9.2+dfsg-2","7.9.2+dfsg-3","7.9.2+dfsg-4","7.9.2+dfsg-5"]},{"source":"osv","ecosystem":"Debian:14","package":"opencascade","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.8.1+dfsg1-3","7.8.1+dfsg1-4~exp1","7.8.1+dfsg1-5","7.8.1+dfsg1-6","7.8.1+dfsg1-7","7.9.1+dfsg-1~exp1","7.9.1+dfsg-1~exp2","7.9.2+dfsg-1","7.9.2+dfsg-2","7.9.2+dfsg-3","7.9.2+dfsg-4","7.9.2+dfsg-5"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"opencascade","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.3.3+dfsg1-1","7.3.3+dfsg1-1build1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"opencascade","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.5.1+dfsg1-2","7.5.1+dfsg1-2ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"opencascade","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.6.3+dfsg1-7","7.6.3+dfsg1-7.1","7.6.3+dfsg1-7.1build1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"opencascade","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.8.1+dfsg1-3"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"opencascade","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.9.2+dfsg-4","7.9.2+dfsg-4build1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"opencascade","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.8.1+dfsg1-3","7.9.2+dfsg-2","7.9.2+dfsg-3","7.9.2+dfsg-4"]}],"products":[{"vendor":"opencascade","product":"open_cascade_technology"}],"references":[{"url":"https://gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94a","tags":["Third Party Advisory","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42481","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-8wqm-37mp-6rrm"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42481.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-42481","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-42481","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-42481","tags":["report"]}],"sources":{"cve":[{"id":"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.","status":"published","published":"2026-05-01T00:00:00Z","modified":"2026-05-01T18:30:42.756Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"adp"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T13:40:23.731501Z"}],"euvd":[{"id":"EUVD-2026-26678","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.","status":"published","published":"2026-05-01T00:00:00Z","modified":"2026-05-01T18:30:42Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T19:05:18.340967Z"}],"ghsa":[{"id":"GHSA-8wqm-37mp-6rrm","title":"Open CASCADE Technology (OCCT) V8_0_0_rc5 contains multiple vulnerabilities in its IGES and STEP...","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.","status":"published","published":"2026-05-01T18:31:24Z","modified":"2026-05-01T21:32:27Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:07:53.39389Z"}],"nvd":[{"id":"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.","status":"published","published":"2026-05-01T16:16:32.163Z","modified":"2026-11-08T16:10:00.183Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-125"],"updated_at":"2026-11-08T18:10:35.384749Z"}],"osv":[{"id":"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.","status":"published","published":"2026-05-01T00:00:00Z","modified":"2026-11-10T02:30:36.347215808Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-10T02:45:53.470331Z"},{"id":"DEBIAN-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.","status":"published","published":"2026-05-01T16:16:32.163Z","modified":"2026-11-09T09:47:30.102645214Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-09T10:23:19.768736Z"},{"id":"UBUNTU-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.","status":"published","published":"2026-05-01T16:16:00Z","modified":"2026-10-17T13:00:05.184685721Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:56:18.393417Z"}]}}