CVE-2026-42477 Memory corruption in n/a
A heap-based out-of-bounds read in the OCCT OBJ parser allows attackers to cause denial of service or leak sensitive information via crafted files.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-42477?
CVE-2026-42477 is a medium-severity memory corruption vulnerability in n/a, published on 1 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
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.
Which versions are affected by CVE-2026-42477?
It affects 1 product.
Products include Opencascade Open Cascade Technology.
How do I fix CVE-2026-42477?
No fix has been published for CVE-2026-42477 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-42477 being exploited?
There is no known exploitation of CVE-2026-42477 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2026-42477, GHSA-3vcm-9wgv-947g, UBUNTU-CVE-2026-42477.