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

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-09-17 · updated 2026-09-29
Weakness: CWE-125

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.

Affected products

OpenImageIO Project OpenImageIO: before 3.0.16.0; from 3.1.0.0 before 3.1.11.0 — fixed in 3.0.16.0, 3.1.11.0

How to fix

Upgrade to a fixed version: OpenImageIO Project OpenImageIO 3.0.16.0, 3.1.11.0. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2026-50291 or the next vulnerability affects your stack