PT-2026-36494 · Unknown · Open Cascade Technology

Feng Ning · Published 2026-05-01 · Updated 2026-05-01 · CVE-2026-42481

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Open CASCADE Technology (OCCT) version V8 0 0 rc5

Description Multiple issues exist in the IGES and STEP file parsers that can be triggered by crafted files. These include an out-of-bounds read (reading data outside the intended boundary of a buffer) in the Geom2d BSplineCurve::EvalD0 function during IGES B-spline curve evaluation, an out-of-bounds read in the MakeBSplineCurveCommon function during STEP B-spline curve construction, and infinite recursion (a function calling itself without a termination condition) in the StepShape OrientedEdge::EdgeStart function when processing a self-referential OrientedEdge entity. Exploitation may lead to denial of service or unintended memory disclosure.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-42481

Affected Products

Open Cascade Technology

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-42481 · Security Note
• https://gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94a · Note
• https://twitter.com/VulmonFeeds/status/2050353689261486288 · Twitter Post
• https://twitter.com/infoflowcloud/status/2050255723846565961 · Twitter Post
• https://twitter.com/CVEnew/status/2050254051573416046 · Twitter Post