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5.5
CVE-2026-42481: Open CASCADE Technology can crash or leak memory from malicious CAD files
CVE-2026-42481 · published 6 months ago
Summary
Open CASCADE Technology can be crashed or made to leak memory if it's given a specially crafted computer-aided design (CAD) file. This could happen if you use a file that's been tampered with, which might cause your software to freeze or reveal sensitive information. Update to the latest version of Open CASCADE Technology to protect against this risk.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Debian:11 | debian | opencascade | All versions |
| Debian:12 | debian | opencascade | All versions |
| Debian:13 | debian | opencascade | All versions |
| Debian:14 | debian | opencascade | All versions |
| Ubuntu:20.04:LTS | canonical | opencascade | All versions |
Original advisory text
Open CASCADE Technology (OCCT) V8_0_0_rc5 contains multiple vulnerabilities in its IGES and STEP file parsers that can be triggered by crafted IGES or STEP files. These issues include an out-of-bou...
Open CASCADE Technology (OCCT) V8_0_0_rc5 contains multiple vulnerabilities in its IGES and STEP file parsers that can be triggered by crafted IGES or STEP files. These issues include an out-of-bounds read in Geom2d_BSplineCurve::EvalD0 during IGES B-spline curve evaluation, an out-of-bounds read in MakeBSplineCurveCommon during STEP B-spline curve construction, and infinite recursion in StepShape_OrientedEdge::EdgeStart when processing a self-referential OrientedEdge entity. Successful exploitation may result in denial of service or unintended memory disclosure.
References
- https://gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94a Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2026-42481 Vendor Advisory
- https://ubuntu.com/security/CVE-2026-42481 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-42481 Third Party Advisory
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker partial control
Type
CWE-125Out-of-bounds Read
Timeline
Published1 May 2026
Updated26 Oct 2026
First seen1 May 2026
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