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6.1 Medium

CVE-2026-59956 OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX /…

Description

OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.20.0, 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 products and versions

Product Affected versions Fixed in
OpenImageIO 3.2 3.2.0.0-dev → < 3.2.0.3-beta1 3.2.0.3-beta1
OpenImageIO 3.1 3.1.0.0 → < 3.1.15.0 3.1.15.0
OpenImageIO 3.0 earliest → < 3.0.20.0 3.0.20.0

References

Timeline

  1. Published
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Other CVEs of OpenImageIO

The 23 CVEs of OpenImageIO →
CVE-2026-113681 OpenImageIO before 3.0.20.0, 3.1.x before 3.1.15.0, and 3.2.x before 3.2.0.3-beta1 contains an integer overflow in… 6.8 Medium CVE-2026-65969 OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX /… 5.5 Medium CVE-2026-67549 OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX /… 7.6 High CVE-2026-63638 OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX /… 8.3 High
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