CVE-2026-59181 — OpenImageIO: Stack buffer overflow in OpenImageIO Cineon reader via unchecked numberOfElements

Description (CNA)

OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1, A crafted cineon file can supply a numberofelements value greater than the format maximum of eight. cineoninput::open() uses that unchecked value as the loop bound while filling the fixed strings[8] array, writing pointers beyond the stack buffer and into adjacent state, resulting in memory corruption and denial of service. The affected implementation is identified by src/cineon.imageio/cineoninput.cpp, CineonInput::open(), numberOfElements, and strings[8], which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1.

Affected (CNA)

Vendor / product	Versions
AcademySoftwareFoundation / OpenImageIO	affected < 3.0.20.0; affected >= 3.1.0.0, < 3.1.15.0; affected >= 3.2.0.0-dev, < 3.2.0.3-beta1

CWE

CWE-121, CWE-787

References

ADP enrichment

CISA-ADP

No English description supplied.

https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-xh8r-vmqq-56pp