Vulnerability Details CVE-2026-42477
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.
Exploit prediction scoring system (EPSS) score
CVSS Severity
CVSS v3 Score 7.1
Products affected by CVE-2026-42477
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cpe:2.3:a:opencascade:open_cascade_technology:6.5.0
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cpe:2.3:a:opencascade:open_cascade_technology:6.5.1
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cpe:2.3:a:opencascade:open_cascade_technology:6.5.2
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cpe:2.3:a:opencascade:open_cascade_technology:6.5.3
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cpe:2.3:a:opencascade:open_cascade_technology:6.5.4
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cpe:2.3:a:opencascade:open_cascade_technology:6.5.5
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cpe:2.3:a:opencascade:open_cascade_technology:6.6.0
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cpe:2.3:a:opencascade:open_cascade_technology:6.7.0
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cpe:2.3:a:opencascade:open_cascade_technology:6.7.1
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cpe:2.3:a:opencascade:open_cascade_technology:6.7.2
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cpe:2.3:a:opencascade:open_cascade_technology:6.8.0
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cpe:2.3:a:opencascade:open_cascade_technology:6.9.0
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cpe:2.3:a:opencascade:open_cascade_technology:6.9.1
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cpe:2.3:a:opencascade:open_cascade_technology:7.0.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.0.1
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cpe:2.3:a:opencascade:open_cascade_technology:7.1.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.2.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.3.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.4.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.5.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.5.1
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cpe:2.3:a:opencascade:open_cascade_technology:7.5.2
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cpe:2.3:a:opencascade:open_cascade_technology:7.5.3
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cpe:2.3:a:opencascade:open_cascade_technology:7.6.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.6.1
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cpe:2.3:a:opencascade:open_cascade_technology:7.6.2
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cpe:2.3:a:opencascade:open_cascade_technology:7.6.3
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cpe:2.3:a:opencascade:open_cascade_technology:7.7.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.7.1
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cpe:2.3:a:opencascade:open_cascade_technology:7.7.2
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cpe:2.3:a:opencascade:open_cascade_technology:7.8.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.8.1
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cpe:2.3:a:opencascade:open_cascade_technology:7.9.0
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cpe:2.3:a:opencascade:open_cascade_technology:7.9.1
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cpe:2.3:a:opencascade:open_cascade_technology:7.9.2
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cpe:2.3:a:opencascade:open_cascade_technology:7.9.3
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cpe:2.3:a:opencascade:open_cascade_technology:8.0.0