{"id":"CVE-2026-42476","aliases":["DEBIAN-CVE-2026-42476","EUVD-2026-26599","GHSA-8gr4-rxj5-hxc5","UBUNTU-CVE-2026-42476"],"status":"published","title":"Two heap-based out-of-bounds read vulnerabilities in the STL ASCII file parser in Open CASCADE...","description":"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. User-assisted attackers can trigger these issues by persuading a victim to open a crafted STL file with extremely short lines, resulting in a denial of service or possible information disclosure.","severity":{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00106,"percentile":0.01103,"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":"2026-10-28T02:30:23Z","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-2026-42476","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-8gr4-rxj5-hxc5"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42476.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-42476","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-42476","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-42476","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-42476","description":"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. User-assisted attackers can trigger these issues by persuading a victim to open a crafted STL file with extremely short lines, resulting in a denial of service or possible information disclosure.","status":"published","published":"2026-05-01T00:00:00Z","modified":"2026-05-01T18:32:41.481Z","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":"2026-11-02T13:40:35.004553Z"}],"euvd":[{"id":"EUVD-2026-26599","description":"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. User-assisted attackers can trigger these issues by persuading a victim to open a crafted STL file with extremely short lines, resulting in a denial of service or possible information disclosure.","status":"published","published":"2026-05-01T00:00:00Z","modified":"2026-05-01T18:32:41Z","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-8gr4-rxj5-hxc5","title":"Two heap-based out-of-bounds read vulnerabilities in the STL ASCII file parser in Open CASCADE...","description":"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. User-assisted attackers can trigger these issues by persuading a victim to open a crafted STL file with extremely short lines, resulting in a denial of service or possible information disclosure.","status":"published","published":"2026-05-01T15:30:36Z","modified":"2026-05-01T18:32:32Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:07:52.84276Z"}],"nvd":[{"id":"CVE-2026-42476","description":"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. User-assisted attackers can trigger these issues by persuading a victim to open a crafted STL file with extremely short lines, resulting in a denial of service or possible information disclosure.","status":"published","published":"2026-05-01T15:16:43.62Z","modified":"2026-06-17T10:47:54.227Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high","assessor":"primary"},{"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":"2026-11-02T14:12:16.626888Z"}],"osv":[{"id":"CVE-2026-42476","description":"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. User-assisted attackers can trigger these issues by persuading a victim to open a crafted STL file with extremely short lines, resulting in a denial of service or possible information disclosure.","status":"published","published":"2026-05-01T00:00:00Z","modified":"2026-10-28T02:30:23.611433457Z","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":"2026-11-02T15:45:04.117819Z"},{"id":"DEBIAN-CVE-2026-42476","description":"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. User-assisted attackers can trigger these issues by persuading a victim to open a crafted STL file with extremely short lines, resulting in a denial of service or possible information disclosure.","status":"published","published":"2026-05-01T15:16:43.62Z","modified":"2026-10-01T03:03:05.158572112Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:54.892385Z"},{"id":"UBUNTU-CVE-2026-42476","description":"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. User-assisted attackers can trigger these issues by persuading a victim to open a crafted STL file with extremely short lines, resulting in a denial of service or possible information disclosure.","status":"published","published":"2026-05-01T15:16:00Z","modified":"2026-10-17T13:00:05.214226552Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high"},{"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"}]}}