---
id: CVE-2026-68516
title: >-
  OpenEXR is the reference implementation and specification for the EXR image
  format, widely used in the motion picture industry
summary: >-
  OpenEXR is the reference implementation and specification for the EXR image
  format, widely used in the motion picture industry. From version 3.4.0 through
  3.4.13, a crafted HTJ2K-compressed EXR can crash OpenEXR during normal decode.
  An …
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-121
  - CWE-787
published: '2026-08-24'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:07:31.353'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-68516'
references:
  - url: >-
      https://github.com/AcademySoftwareFoundation/openexr/commit/45521f92104373b5c850f27f2d4659ab6759e848
    label: security-advisories@github.com
  - url: >-
      https://github.com/AcademySoftwareFoundation/openexr/commit/85009d840cc085aa96ad03ae76fa6463defeb0e5
    label: security-advisories@github.com
  - url: >-
      https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-fw66-6xph-56jm
    label: security-advisories@github.com
  - url: >-
      https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-fw66-6xph-56jm
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00452
epssPercentile: 0.36543
ingestedAt: '2026-09-09T21:22:45.549Z'
---

## Overview

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. From version 3.4.0 through 3.4.13, a crafted HTJ2K-compressed EXR can crash OpenEXR during normal decode. An HTJ2K-compressed EXR whose JPEG 2000 SIZ fields place the first tile outside the visible image can reach invalid tile and codeblock geometry in the vendored OpenJPH AVX2 decoder, causing a stack out-of-bounds write and denial of service. OpenEXR's HTJ2K path validates the decoded codestream dimensions against the EXR chunk size, but it does not reject SIZ image-offset/tile-grid geometry where the first tile does not intersect the image. This issue is fixed in version 3.4.14.

## Remediation

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