CVE-2026-43905 OpenImageIO: JPEG2000 (OpenJPH) signed integer overflow in buffer allocation
A signed integer overflow in OpenImageIO's JPEG2000 handling can lead to heap overflow and potential code execution when processing crafted images.
- 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-2026-43905?
CVE-2026-43905 is a high-severity 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, jpeg2000input.cpp:395 computes buffer size as const int bufsize = w * h * ch * buffer_bpp using signed 32-bit arithmetic. When the product exceeds INT_MAX, the result wraps to 0 or a small value. m_buf.resize() allocates an undersized buffer, and subsequent pixel write loops cause heap overflow. Conditional on USE_OPENJPH build flag. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
Weakness: CWE-190
Which versions are affected by CVE-2026-43905?
It affects 1 product.
Products include Openimageio Openimageio.
How do I fix CVE-2026-43905?
Upgrade to a fixed version.
Is CVE-2026-43905 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43905 exists.
Other vulnerabilities in Openimageio Openimageio
Sources
Also known as DEBIAN-CVE-2026-43905, GHSA-pj45-cf3g-28gq.