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Vulnerability · Published May 1, 2026 · Assigned by mitre

CVE-2026-42477

Medium 5.5

In plain English

A medium-severity heap buffer overflow in the opencascade package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.1%top 99.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A heap-based out-of-bounds read vulnerability in RWObj_Reader::read in the OBJ file parser in Open CASCADE Technology (OCCT) V8_0_0_rc5 allows user-assisted attackers to cause a denial of service or obtain sensitive information by persuading a victim to open a crafted OBJ file. The issue occurs because Standard_ReadLineBuffer::ReadLine() can return a 1-byte buffer for a minimal OBJ line, and RWObj_Reader::read() calls pushIndices(aLine + 2) without validating the buffer length.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12opencascadeno fix listedDEBIAN-CVE-2026-42477
Debian:13opencascadeno fix listedDEBIAN-CVE-2026-42477
Debian:14opencascadeno fix listedDEBIAN-CVE-2026-42477
Ubuntu:22.04:LTSopencascadeno fix listedUBUNTU-CVE-2026-42477
Ubuntu:24.04:LTSopencascadeno fix listedUBUNTU-CVE-2026-42477
Ubuntu:25.10opencascadeno fix listedUBUNTU-CVE-2026-42477
Ubuntu:26.04:LTSopencascadeno fix listedUBUNTU-CVE-2026-42477
Ubuntu:26.10opencascadeno fix listedUBUNTU-CVE-2026-42477

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-122 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References