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CVSS 7.5 · HIGH

CVE-2026-42478

An issue was discovered in VrmlData_IndexedFaceSet::TShape in the VRML V2.0 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 malformed VRML input can trigger dereference of a corrupt or unvalidated pointer during shape construction in libTKDEVRML.so.

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Analysis

This vulnerability affects Open CASCADE Technology, a specialized C++ library for 3D CAD modeling. While the severity is high, the impact is limited to a denial of service via malformed VRML files in a niche engineering context that is not relevant to the majority of web and mobile developers.

Severity

Score: 7.5(HIGH)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV: NETWORK
AC: LOW
PR: NONE
UI: NONE
S: UNCHANGED
C: NONE
I: NONE
A: HIGH
Weakness (CWE): CWE-476CWE-125

EPSS

Probability of exploitation (next 30 days): 0.0003 (0.0%)
Percentile: 8.3%
EPSS: 2026-05-06

Affects

opencascade:open_cascade_technology

Technical description

An issue was discovered in VrmlData_IndexedFaceSet::TShape in the VRML V2.0 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 malformed VRML input can trigger dereference of a corrupt or unvalidated pointer during shape construction in libTKDEVRML.so.

Published: 5/1/2026, 3:16:43 PM
Last modified: 5/1/2026, 7:16:32 PM

References

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