---
id: CVE-2026-63422
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, A valid tiled openexr image whose width is not a
  multiple o…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-122
  - CWE-787
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: '2026-09-23T18:12:04.247'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63422'
references:
  - url: >-
      https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/7303134f13b0f9dc738b8ecabecd8c9f90cbd4c9
    label: security-advisories@github.com
  - url: 'https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5295'
    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-xh5r-whph-qmc5
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
epss: 0.00186
epssPercentile: 0.07337
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-18T19:24:31.356177Z'
ingestedAt: '2026-09-18T16:45:41.388Z'
---

## 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, A valid tiled openexr image whose width is not a multiple of its tile width can trigger an overflow when a caller reads a partial edge-tile rectangle. openexrinput::read_native_tiles() copies each row into the caller buffer using the padded whole-tile scanline_stride rather than user_scanline_bytes for the requested rectangle, resulting in a heap out-of-bounds write and memory corruption. The affected implementation is identified by src/openexr.imageio/exrinput.cpp, OpenEXRInput::read_native_tiles(), partial edge tile, user_scanline_bytes, and scanline_stride, 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.