CVE-2026-42479: An out-of-bounds read vulnerability in VrmlData_IndexedLineSet::TShape in the VRML parser in Open CASCADE Technology…
CVE-2026-42479 · Severity: medium · CVSS 5.5 · Published 2026-05-01
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.
No. Junglewise Threat Intelligence has no report of CVE-2026-42479 being exploited in the wild.
How severe is CVE-2026-42479?
Medium severity, with a CVSS score of 5.5, published 1 May 2026.
Which products and versions are affected?
Opencascade Open Cascade Technology. The advisory does not name versions.
Is there a fix for CVE-2026-42479?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-42479?
Check whether you run Opencascade Open Cascade Technology. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.