---
id: CVE-2026-59187
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. OpenEXR versions 3.3.0
  through 3.3.12 and 3.4.0 through 3.4.13 are vulnerable to a heap out-of-bounds
  write w…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H'
cwe:
  - CWE-122
  - CWE-787
published: '2026-08-25'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:07:31.353'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59187'
references:
  - url: >-
      https://github.com/AcademySoftwareFoundation/openexr/commit/46e70220dc91dbc1341fac4671704e970b450585
    label: security-advisories@github.com
  - url: >-
      https://github.com/AcademySoftwareFoundation/openexr/commit/7e772dd704b9b5d6dc2564647d89f7813f608e94
    label: security-advisories@github.com
  - url: >-
      https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-6jj8-cxcr-j8hm
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-59187.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-59187'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2523673'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-59187'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59187'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
epss: 0.00217
epssPercentile: 0.12376
ingestedAt: '2026-09-09T21:22:45.552Z'
vendor: Red Hat
---

## Overview

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. OpenEXR versions 3.3.0 through 3.3.12 and 3.4.0 through 3.4.13 are vulnerable to a heap out-of-bounds write when exrmetrics reads a crafted deep scanline EXR. This occurs with pixel conversion options such as --pixelmode float or --bench because DeepSlice requests FLOAT output while the backing sample buffers are allocated using the input HALF element size. The issue is fixed in versions 3.3.13 and 3.4.14.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Important · updated 2026-09-19 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-59187.json)