PT-2026-36476 · Unknown · Open Cascade Technology

Feng Ning · CVE-2026-42477 · Published 2026-05-01 · Updated 2026-05-01

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 A heap-based out-of-bounds read in the OBJ file parser occurs within the RWObj Reader::read function. This happens because Standard ReadLineBuffer::ReadLine() may return a 1-byte buffer for a minimal OBJ line, and RWObj Reader::read() subsequently calls pushIndices(aLine + 2) without validating the buffer length. User-assisted attackers can exploit this by persuading a victim to open a specially crafted OBJ file, potentially leading to a denial of service or the disclosure of sensitive information.

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

Exploit

Heap Based Buffer Overflow

Out of bounds Read

Weakness Enumeration

CWE-122

CWE-125

Related Identifiers

CVE-2026-42477

Affected Products

Open Cascade Technology

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42477.json · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-42477 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-42477 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42477 · Security Note
• https://osv.dev/vulnerability/CVE-2026-42477 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-42477 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-42477 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-42477 · Security Note
• https://twitter.com/CVEnew/status/2050254047739789356 · Twitter Post
• https://twitter.com/infoflowcloud/status/2050255669043884251 · Twitter Post
• https://gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94a · Note