CVE-2026-34545

Full vulnerability record from the local CVENow database.
Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From version 3.4.0 to before version 3.4.7, an attacker providing a crafted .exr file with HTJ2K compression and a channel width of 32768 can write controlled data beyond the output heap buffer in any application that decodes EXR images. The write primitive is 2 bytes per overflow iteration or 4 bytes (by another path), repeating for each additional pixel past the overflow point. In this context, a heap write overflow can lead to remote code execution on systems. This issue has been patched in version 3.4.7.
Severity
HIGH
CVSS score
8.4 (v4.0)
Vulnerability status
Modified
Source identifier
[email protected]
Published
2026-04-01 21:17:01.640000
Last modified
2026-10-26 22:10:00.163000
View original CVE JSON
{
  "id": "CVE-2026-34545",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-01T21:17:01.640",
  "lastModified": "2026-10-26T22:10:00.163",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From version 3.4.0 to before version 3.4.7, an attacker providing a crafted .exr file with HTJ2K compression and a channel width of 32768 can write controlled data beyond the output heap buffer in any application that decodes EXR images. The write primitive is 2 bytes per overflow iteration or 4 bytes (by another path), repeating for each additional pixel past the overflow point. In this context, a heap write overflow can lead to remote code execution on systems. This issue has been patched in version 3.4.7."
    },
    {
      "lang": "es",
      "value": "OpenEXR proporciona la especificación y la implementación de referencia del formato de archivo EXR, un formato de almacenamiento de imágenes para la industria cinematográfica. Desde la versión 3.4.0 hasta antes de la versión 3.4.7, un atacante que proporciona un archivo .exr manipulado con compresión HTJ2K y un ancho de canal de 32768 puede escribir datos controlados más allá del búfer de salida del montón en cualquier aplicación que decodifique imágenes EXR. La primitiva de escritura es de 2 bytes por iteración de desbordamiento o 4 bytes (por otra ruta), repitiéndose por cada píxel adicional más allá del punto de desbordamiento. En este contexto, un desbordamiento de escritura en el montón puede conducir a la ejecución remota de código en los sistemas. Este problema ha sido parcheado en la versión 3.4.7."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "AcademySoftwareFoundation",
          "product": "openexr",
          "versions": [
            {
              "version": ">= 3.4.0, < 3.4.7",
              "status": "affected"
            }
          ]
        }
      ]
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "affectedData": [
        {
          "vendor": "Red Hat",
          "product": "Red Hat Enterprise Linux 10",
          "defaultStatus": "unaffected",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "packageName": "OpenEXR",
          "cpes": [
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          "packageName": "OpenEXR",
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          "packageName": "OpenEXR",
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        {
          "vendor": "Red Hat",
          "product": "Red Hat Enterprise Linux 9",
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          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "packageName": "OpenEXR",
          "cpes": [
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  "metrics": {
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        "type": "Secondary",
        "cvssData": {
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          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
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          "attackRequirements": "NONE",
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          "vulnAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
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        "type": "Secondary",
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    "ssvcV203": [
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        "ssvcData": {
          "timestamp": "2026-04-03T19:46:42.924931Z",
          "id": "CVE-2026-34545",
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            },
            {
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            },
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          "role": "CISA Coordinator",
          "version": "2.0.3"
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  "weaknesses": [
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      "source": "[email protected]",
      "type": "Secondary",
      "description": [
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          "value": "CWE-122"
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          "cpeMatch": [
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      "url": "https://github.com/AcademySoftwareFoundation/openexr/commit/3827998f5c041d6a94c6af24bbb363daa669e4b3",
      "source": "[email protected]",
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      "source": "[email protected]",
      "tags": [
        "Product",
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-ghfj-fx47-wg97",
      "source": "[email protected]",
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        "Vendor Advisory"
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}