CVE-2026-43996 Integer overflow in OpenImageIO
An integer overflow in OpenImageIO's TGA decoder allows out-of-bounds reads, potentially causing crashes or leaking memory contents.
- 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-2026-43996?
CVE-2026-43996 is a medium-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, the bounds check in TGAInput::decode_pixel computes k + palbytespp as unsigned 32-bit arithmetic. When k = 0xFFFFFFFC and palbytespp = 4, the addition wraps to 0, which compares less than palette_alloc_size and passes the check. The subsequent palette access uses the unwrapped k (0xFFFFFFFC) as the index, reading ~4 GB past the start of the palette buffer — SEGV. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
Weakness: CWE-125
Which versions are affected by CVE-2026-43996?
It affects 1 product.
Products include Openimageio Openimageio.
How do I fix CVE-2026-43996?
Upgrade to a fixed version.
Is CVE-2026-43996 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43996 exists.
Other vulnerabilities in Openimageio Openimageio
Sources
Also known as DEBIAN-CVE-2026-43996, GHSA-mq8j-73c4-cr55, UBUNTU-CVE-2026-43996.