---
id: CVE-2026-63420
title: >-
  OpenImageIO is a toolset for reading, writing, and manipulating image files of
  any image file format relevant to VFX / animation
summary: >-
  OpenImageIO is a toolset for reading, writing, and manipulating image files of
  any image file format relevant to VFX / animation. Prior to 3.0.21.0,
  3.1.16.0, and 3.2.0.3-beta1, An indexed psd with transparency metadata creates
  fewer sto…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-125
  - CWE-129
vendor: AcademySoftwareFoundation
product: OpenImageIO
affected:
  - OpenImageIO < 3.0.21.0
  - 'OpenImageIO >= 3.1.0.0, < 3.1.16.0'
  - 'OpenImageIO >= 3.2.0.0-dev, < 3.2.0.3-beta1'
published: '2026-09-18'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:25:00.707'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63420'
references:
  - url: >-
      https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/4995b25b8216552630e0aee0d8870e0d3aaae7ee
    label: security-advisories@github.com
  - url: 'https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5307'
    label: security-advisories@github.com
  - url: >-
      https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.21.0
    label: security-advisories@github.com
  - url: >-
      https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0
    label: security-advisories@github.com
  - url: >-
      https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-x877-h4xx-5m5j
    label: security-advisories@github.com
  - url: >-
      https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-x877-h4xx-5m5j
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00172
epssPercentile: 0.05836
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-22T14:44:08.621517Z'
ingestedAt: '2026-09-18T16:45:41.387Z'
---

## Overview

OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1, An indexed psd with transparency metadata creates fewer stored channel_buffers than the spec.nchannels value advertised by the rawcolor path. when oiio:rawcolor or psd:rawdata is enabled, psdinput::read_native_scanline() passes spec.nchannels to psdinput::interleave_row(), which indexes beyond channel_buffers, resulting in a heap out-of-bounds read and process crash. The affected implementation is identified by src/psd.imageio/psdinput.cpp, PSDInput::read_native_scanline(), PSDInput::interleave_row(), oiio:RawColor, psd:RawData, channel_buffers, and spec.nchannels, which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.