CVE-2026-59956: 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…

PriorityP427medium6.1CVSS 3.1

AVLACLPRNUIRSUCLINAH

EPSS

0.20%

9.6th percentile

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, An uncompressed 16-bit iff image with a z-buffer makes iffinput::readimg() allocate a temporary scanline from m_header.rgba_count but copy from it using m_header.pixel_bytes(), whose stride also includes z-buffer bytes. the oversized memcpy reads beyond the temporary heap buffer and copies adjacent memory into the output image, resulting in a crash or disclosure of adjacent heap data. The affected implementation is identified by src/iff.imageio/iffinput.cpp, IffInput::readimg(), m_header.rgba_count, and m_header.pixel_bytes(), 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

7 ranges

Vendor	Product	Version range	Fixed in
academysoftwarefoundation	openimageio	< 3.0.20.0	3.0.20.0
academysoftwarefoundation	openimageio	—	—
academysoftwarefoundation	openimageio	—	—
openimageio	openimageio	< 3.0.20.0	3.0.20.0
openimageio	openimageio	—	—
openimageio	openimageio	—	—
openimageio	openimageio	3.1.0.0 – 3.1.15.0	—

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