What is CVE-2026-42476?

CVE-2026-42476 is a high-severity vulnerability in Opencascade Open_cascade_technology, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2026-05-01.

How severe is CVE-2026-42476?

High severity. CVSS v3 base score is 7.1 out of 10.

Out-of-bounds Read in Opencascade Open_cascade_technology

CVE-2026-42476

Two heap-based out-of-bounds read vulnerabilities in the STL ASCII file parser in Open CASCADE Technology (OCCT) V8_0_0_rc5 exist in RWStl_Reader::ReadAscii because buffers returned by Standard_ReadLineBuffer::ReadLine() are not properly l…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (2.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H.

Affected products

Opencascade Open_cascade_technology — versions 8.0.0
N/a — versions n/a

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

cve@mitre.org (Third Party Advisory)

Frequently asked questions

What is CVE-2026-42476?: CVE-2026-42476 is a high-severity vulnerability in Opencascade Open_cascade_technology, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2026-05-01.
How severe is CVE-2026-42476?: High severity. CVSS v3 base score is 7.1 out of 10.