---
id: CVE-2026-113681
title: >-
  OpenImageIO before 3.0.20.0, 3.1.x before 3.1.15.0, and 3.2.x before
  3.2.0.3-beta1 Cineon Reader Heap Out-of-Bounds Read
summary: >-
  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 cineon::Codec::Read that
  undersizes the scanline buffer, causing a heap out-of-bounds read. Attackers
  can supply a crafted…
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'
cvssSource: cna
cwe:
  - CWE-190
vendor: AcademySoftwareFoundation
product: OpenImageIO
affected:
  - OpenImageIO < 3.0.20.0
  - OpenImageIO >= 3.1.0.0 < 3.1.15.0
  - OpenImageIO >= 3.2.0.0-dev < 3.2.0.3-beta1
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-20T16:21:27.916905Z'
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T16:21:37.806Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-113681'
references:
  - url: 'https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5567'
  - url: 'https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5568'
  - url: >-
      https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/07e3c3e0373551c57e7d8e01353deaa4b3646613
  - url: >-
      https://github.com/AcademySoftwareFoundation/OpenImageIO/blob/v3.0.19.0/src/cineon.imageio/libcineon/Codec.cpp#L79-L82
  - url: >-
      https://www.vulncheck.com/advisories/openimageio-before-3.0.20.0-3.1-x-before-3.1.15.0-and-3.2-x-before-3.2.0.3-beta1-cineon-reader-heap-out-of-bounds-read
    label: >-
      VulnCheck Advisory: OpenImageIO before 3.0.20.0, 3.1.x before 3.1.15.0,
      and 3.2.x before 3.2.0.3-beta1 Cineon Reader Heap Out-of-Bounds Read
tags:
  - cve.org
ingestedAt: '2026-10-20T16:10:53.298Z'
---

## Overview

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 cineon::Codec::Read that undersizes the scanline buffer, causing a heap out-of-bounds read. Attackers can supply a crafted Cineon file with a huge declared width that wraps the size calculation to zero, so UnPackPacked reads past a 4-byte buffer and crashes the application.

## Affected

- `OpenImageIO < 3.0.20.0`
- `OpenImageIO >= 3.1.0.0 < 3.1.15.0`
- `OpenImageIO >= 3.2.0.0-dev < 3.2.0.3-beta1`

## Remediation

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