CVE-2026-42479 Denial of service in n/a
Attackers can cause denial of service in Open CASCADE Technology via crafted VRML files exploiting an out-of-bounds read in the parser.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-42479?
CVE-2026-42479 is a medium-severity denial of service vulnerability in n/a, published on 1 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-125
Which versions are affected by CVE-2026-42479?
It affects 1 product.
Products include Opencascade Open Cascade Technology.
How do I fix CVE-2026-42479?
No fix has been published for CVE-2026-42479 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-42479 being exploited?
There is no known exploitation of CVE-2026-42479 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2026-42479, GHSA-2wfq-x8g9-pm2c, UBUNTU-CVE-2026-42479.