PT-2026-36475 · Unknown · Open Cascade Technology

Sginnora · Published 2026-05-01 · Updated 2026-05-01 · CVE-2026-42476

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 Two heap-based out-of-bounds read issues exist in the STL ASCII file parser within the RWStl Reader::ReadAscii() function. These occur because buffers returned by Standard ReadLineBuffer::ReadLine() are not properly length-validated before being used in strncasecmp or during direct byte access. A user-assisted attacker can trigger these issues by persuading a victim to open a specially crafted STL file containing extremely short lines, which may lead to a denial of service or information 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-2026-42476

Affected Products

Open Cascade Technology

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-42476 · Security Note
• https://gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94a · Note
• https://twitter.com/CVEnew/status/2050254046791975412 · Twitter Post