CVE-2026-42477
High
Description
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.
SeverityHigh
CVSS7.1
Exploit probability—
ProductOpencascade Open Cascade Technology
PublishedMay 1, 2026
First seenMay 1, 2026
Weakness typeCWE-122CWE-122
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| opencascade open_cascade_technology | v ≤ 7.9.3, 8.0.0 | — |
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