CVE-2026-43903 OpenImageIO: SGI RLE decoder heap buffer overflow OIIO_DASSERT bounds checks are no-ops in release builds
A heap buffer overflow in OpenImageIO's SGI RLE decoder allows attackers to cause crashes or potentially execute code via crafted image files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-43903?
CVE-2026-43903 is a high-severity memory corruption vulnerability in Openimageio Openimageio, published on 14 May 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, sgiinput.cpp:265,274 use OIIO_DASSERT for bounds checking in the RLE decode loop. In release builds, OIIO_DASSERT compiles to ((void)sizeof(x)) (dassert.h:210), making all bounds checks no-ops. A crafted .sgi file with RLE count exceeding scanline width causes heap buffer overflow and crash. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
Weakness: CWE-787
Which versions are affected by CVE-2026-43903?
It affects 1 product.
Products include Openimageio Openimageio.
How do I fix CVE-2026-43903?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-43903 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43903 exists.
Other vulnerabilities in Openimageio Openimageio
Sources
Also known as DEBIAN-CVE-2026-43903, GHSA-jg3q-vm3q-2j35, UBUNTU-CVE-2026-43903.