CVE-2026-42479
Open CASCADE Technology VRML Parser Out-of-Bounds Read Denial of Service
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.
INFO
Published Date :
May 1, 2026, 3:16 p.m.
Last Modified :
May 1, 2026, 5:48 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Apply the latest security patch for Open CASCADE Technology.
- Update to a non-vulnerable version of OCCT.
- Validate VRML input data before processing.
- Implement bounds checking for array indices.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-42479.
| URL | Resource |
|---|---|
| https://gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94a | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-42479 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-42479
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-42479 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-42479 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 01, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Added CWE CWE-125 Added CPE Configuration OR *cpe:2.3:a:opencascade:open_cascade_technology:*:*:*:*:*:*:*:* versions up to (including) 7.9.3 *cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:beta1:*:*:*:*:*:* *cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:rc1:*:*:*:*:*:* *cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:rc2:*:*:*:*:*:* *cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:rc3:*:*:*:*:*:* *cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:rc4:*:*:*:*:*:* *cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:rc5:*:*:*:*:*:* Added Reference Type MITRE: https://gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94a Types: Third Party Advisory -
New CVE Received by [email protected]
May. 01, 2026
Action Type Old Value New Value Added 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. Added Reference https://gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94a