CVE-2026-43904 OpenImageIO: Softimage PIC RLE decoder heap buffer overflow — longCount not clamped to image width
A heap buffer overflow in OpenImageIO's Softimage PIC decoder allows attackers to execute arbitrary code or cause denial of service 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-2026-43904?
CVE-2026-43904 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, softimageinput.cpp:469 (mixed RLE) and :345 (pure RLE) do not clamp the run length to remaining scanline width before writing pixels. The raw packet path (line 403) correctly clamps with std::min, but RLE paths skip this check. A crafted .pic file causes heap overflow up to 65535 bytes. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
Weakness: CWE-787
Which versions are affected by CVE-2026-43904?
It affects 1 product.
Products include Openimageio Openimageio.
How do I fix CVE-2026-43904?
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-2026-43904 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43904 exists.
Other vulnerabilities in Openimageio Openimageio
Sources
Also known as DEBIAN-CVE-2026-43904, GHSA-4499-j545-7q33, UBUNTU-CVE-2026-43904.