CVE-2026-42479
Medium
Description
An out-of-bounds read vulnerability in VrmlData_IndexedLineSet::TShape in the VRML parser in Open CASCADE Technology (OCCT) V8_0_0_rc5 allows attackers to cause a denial of service via a crafted VRML file. The issue occurs because coordIndex values from parsed input are used as direct array indices without validation against the size of the coordinate array during geometry processing.
SeverityMedium
CVSS5.5
Exploit probability—
ProductOpencascade Open Cascade Technology
PublishedMay 1, 2026
First seenMay 1, 2026
Weakness typeCWE-125Out-of-bounds read
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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