High
opencascade — security advisory
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 because Standard_ReadLineBuffer::ReadLine() can return a 1-byte buffer for a minimal OBJ line, and RWObj_Reader::read() calls pushIndices(aLine + 2) without validating the buffer length.
- 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-2026-42477
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:03 UTC · Revision 1
Source evidence
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 because Standard_ReadLineBuffer::ReadLine() can return a 1-byte buffer for a minimal OBJ line, and RWObj_Reader::read() calls pushIndices(aLine + 2) without validating the buffer length.
osv:UBUNTU-CVE-2026-42477
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": "9fc1cd0f558a526ba99faae55dee838d87c968d3dc5a05f52d1902e0da930e0c",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-42477",
"method": "structured",
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"title": "UBUNTU-CVE-2026-42477",
"summary": "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 because Standard_ReadLineBuffer::ReadLine() can return a 1-byte buffer for a minimal OBJ line, and RWObj_Reader::read() calls pushIndices(aLine + 2) without validating the buffer length.",
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],
"modified": "2026-10-17T13:00:04.695293106Z",
"provider": "osv",
"upstream": [
"CVE-2026-42477"
],
"references": [
"https://ubuntu.com/security/CVE-2026-42477",
"https://www.cve.org/CVERecord?id=CVE-2026-42477",
"https://gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94a"
]
},
"related_cves": [
{
"value": "CVE-2026-42477",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 360264,
"published_at": "2026-05-01T15:16:00+00:00"
}