CVE-2026-50291 OpenImageIO: Segmentation Fault in BmpInput::read_native_scanline (bmpinput.cpp:399)

What is CVE-2026-50291?

CVE-2026-50291 is a medium-severity denial of service vulnerability in Openimageio Openimageio, published on 17 Sep 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 versions 3.0.16.0 and 3.1.11.0, processing a crafted BMP file through oiiotool or an application linked to OpenImageIO can reach BMP palette handling in src/bmp.imageio/bmpinput.cpp with an empty color table. BmpInput::read_native_scanline then performs an invalid palette read while decoding an RLE-compressed scanline, causing a process crash and denial of service. This issue is fixed in versions 3.0.16.0 and 3.1.11.0.

Weakness: CWE-125

Which versions are affected by CVE-2026-50291?

It affects 1 product.

Products include Openimageio Openimageio.

How do I fix CVE-2026-50291?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-50291 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-50291 exists.

Other vulnerabilities in Openimageio Openimageio

• CVE-2024-55192 Memory corruption in n/a Critical 9.8
• CVE-2024-55194 Memory corruption in n/a Critical 9.8
• CVE-2023-42299 Memory corruption in n/a Critical 9.8
• CVE-2022-38143 Memory corruption in OpenImageIO Critical 9.8
• CVE-2026-43908 OpenImageIO: Signed integer overflow in ConvertCbYCrYToRGB leads to heap out-of-bounds write in DPX 4:2:2 decoder High 8.8

All Openimageio Openimageio vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-50291, GHSA-q3c7-3225-66h7, UBUNTU-CVE-2026-50291.