CVE-2026-34378

{
  "id": "CVE-2026-34378",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-06T16:16:35.057",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Analyzed",
  "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 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9."
    },
    {
      "lang": "es",
      "value": "OpenEXR proporciona la especificación e 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 3.4.9, una falta de verificación de límites en el atributo dataWindow en las cabeceras de los archivos EXR permite a un atacante activar un desbordamiento de entero con signo en generic_unpack(). Al establecer dataWindow.min.x a un valor negativo grande, OpenEXRCore calcula un ancho de imagen enorme, que luego se utiliza en una multiplicación de enteros con signo que se desborda, lo que provoca que el proceso termine con SIGILL a través de UBSan. Esta vulnerabilidad se corrige en la versión 3.4.9."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "AcademySoftwareFoundation",
          "product": "openexr",
          "versions": [
            {
              "version": ">= 3.4.0, < 3.4.9",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-06T15:33:07.546592Z",
          "id": "CVE-2026-34378",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
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  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "3.4.0",
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  "references": [
    {
      "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9",
      "source": "[email protected]",
      "tags": [
        "Product",
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-v76p-4qvv-vh4g",
      "source": "[email protected]",
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}