What is CVE-2026-42478?

CVE-2026-42478 is a high-severity vulnerability in Opencascade Open_cascade_technology, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-05-01.

How severe is CVE-2026-42478?

High severity. CVSS v3 base score is 7.5 out of 10.

NULL pointer dereference in Opencascade Open_cascade_technology

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…

EPSS: 0.000 (11.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Opencascade Open_cascade_technology — versions 8.0.0
N/a — versions n/a

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference
CWE-125 — Out-of-bounds Read

References

cve@mitre.org (Third Party Advisory)

Frequently asked questions

What is CVE-2026-42478?: CVE-2026-42478 is a high-severity vulnerability in Opencascade Open_cascade_technology, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-05-01.
How severe is CVE-2026-42478?: High severity. CVSS v3 base score is 7.5 out of 10.