CVE-2025-5203 Open Asset Import Library Assimp ParsingUtils.h SkipSpaces out-of-bounds
An out-of-bounds read in Assimp's SkipSpaces function allows local attackers to cause denial of service or disclose memory contents 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
- Available
What is CVE-2025-5203?
CVE-2025-5203 is a medium-severity memory corruption vulnerability in Open Asset Import Library Assimp, published on 26 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in Open Asset Import Library Assimp 5.4.3. It has been rated as problematic. Affected by this issue is the function SkipSpaces in the library assimp/include/assimp/ParsingUtils.h. The manipulation leads to out-of-bounds read. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The project decided to collect all Fuzzer bugs in a main-issue to address them in the future.
Which versions are affected by CVE-2025-5203?
It affects 1 product.
Products include Assimp Assimp.
How do I fix CVE-2025-5203?
No fix published yet.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-5203 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-5203 exists.
Other vulnerabilities in Open Asset Import Library Assimp
Sources
Also known as DEBIAN-CVE-2025-5203, GHSA-j83p-cqxw-j383, JLSEC-2026-194, UBUNTU-CVE-2025-5203.