CVE-2026-42479 Details
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.
A denial-of-service vulnerability has been identified in the VRML parser of Open CASCADE Technology (OCCT) version 8.0.0 release candidate 5. The issue arises from an out-of-bounds read in the 'VrmlData_IndexedLineSet::TShape' function. Attackers can exploit this vulnerability by using a crafted VRML file. The problem occurs because 'coordIndex' values from the parsed input are used as direct indices for arrays without proper validation against the size of the coordinate array, leading to memory safety issues.
Users are advised to update to a version of Open CASCADE Technology that includes the necessary bounds checks for 'coordIndex' and 'normalIndex' values in the VRML parser.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 1, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94a | [email protected] | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
| CWE-125 | Out-of-bounds Read | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| opencascade open cascade technology | <= 7.9.3 8.0.0 beta1 8.0.0 rc1 8.0.0 rc2 8.0.0 rc3 8.0.0 rc4 8.0.0 rc5 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 1, 2026 | CVE Modified | CISA-ADP |
| May 1, 2026 | Initial Analysis | [email protected] |
| May 1, 2026 | New CVE Received | [email protected] |