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TI-2026-42760 Aliases CVE-2026-59956

OpenImageIO: Heap-buffer-overread in IffInput::readimg() when ZBUFFER flag is set

Priority MEDIUM 60CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00202 10th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed OpenImageIO (AcademySoftwareFoundation): 3.0.20.0, 3.1.15.0, 3.2.0.3-beta1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AcademySoftwareFoundationOpenImageIObefore 3.0.20.0; 3.1.0.0 to before 3.1.15.0; 3.2.0.0-dev to before 3.2.0.3-beta13.0.20.0, 3.1.15.0, 3.2.0.3-beta1Patch availableCNA
  • OpenImageIO VendorAcademySoftwareFoundation Affected before 3.0.20.0; 3.1.0.0 to before 3.1.15.0; 3.2.0.0-dev to before 3.2.0.3-beta1 Fixed in 3.0.20.0, 3.1.15.0, 3.2.0.3-beta1 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:openimageio:openimageio:*:*:*:*:*:*:*:*before 3.0.20.0; 3.1.0.0 – 3.1.15.0VulnerableOpenImageIO Project
cpe:2.3:a:openimageio:openimageio:3.2.0.0:dev:*:*:*:*:*:*3.2.0.0 devVulnerableOpenImageIO Project
cpe:2.3:a:openimageio:openimageio:3.2.0.2:dev:*:*:*:*:*:*3.2.0.2 devVulnerableOpenImageIO Project
  • cpe:2.3:a:openimageio:openimageio:*:*:*:*:*:*:*:* Versions before 3.0.20.0; 3.1.0.0 – 3.1.15.0 Vulnerable ·OpenImageIO Project
  • cpe:2.3:a:openimageio:openimageio:3.2.0.0:dev:*:*:*:*:*:* Versions 3.2.0.0 dev Vulnerable ·OpenImageIO Project
  • cpe:2.3:a:openimageio:openimageio:3.2.0.2:dev:*:*:*:*:*:* Versions 3.2.0.2 dev Vulnerable ·OpenImageIO Project

Remediation

  • Fix · CNA OpenImageIO (AcademySoftwareFoundation) Fixed in 3.0.20.0, 3.1.15.0, 3.2.0.3-beta1

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-59956

References

Exploit 1

Patch 2

Other 2

  • TI-2026-30739 OpenColorIO vulnerable to stack buffer overflow via unbounded `sscanf %s` in Spi3D (.spi3d) LUT parser CVSS 4.0HIGH 8.4
  • TI-2026-38605 OpenEXR: Unhandled assert abort in HTJ2K decoder via crafted QCD marker (DoS) CVSS 4.0HIGH 7.1
  • TI-2026-48281 OpenEXR: Heap out-of-bounds write in exrmultiview with subsampled channel union CVSS 3.1HIGH 7.1
  • TI-2026-48279 OpenEXR: Heap buffer overflow in PyOpenEXR from literal/prefixed RGB channel name collision CVSS 3.1HIGH 7.1
  • TI-2026-42768 OpenEXR: Heap OOB read in SampleCountChannel row when using nonzero dataWindow CVSS 3.1HIGH 7.1
  • TI-2026-42338 OpenEXR: Out-of-bounds read in DeepImageChannel::row() for non-zero dataWindow origin CVSS 3.1HIGH 7.1
See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences