CVE-2026-26981

{
  "id": "CVE-2026-26981",
  "cveTags": [],
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          "id": "CVE-2026-26981",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "poc"
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            {
              "automatable": "no"
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            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-02-24T19:50:34.463990Z"
        }
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        "type": "Secondary",
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
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  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "AcademySoftwareFoundation",
          "product": "openexr",
          "versions": [
            {
              "status": "affected",
              "version": ">= 3.3.0, < 3.3.7"
            },
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              "status": "affected",
              "version": ">= 3.4.0, < 3.4.5"
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  "published": "2026-02-24T03:16:01.890",
  "references": [
    {
      "url": "https://github.com/AcademySoftwareFoundation/openexr/commit/6bb2ddf1068573d073edf81270a015b38cc05cef",
      "tags": [
        "Patch"
      ],
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    },
    {
      "url": "https://github.com/AcademySoftwareFoundation/openexr/commit/d2be382758adc3e9ab83a3de35138ec28d93ebd8",
      "tags": [
        "Patch"
      ],
      "source": "security-advisories@github.com"
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    {
      "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-q6vj-wxvf-5m8c",
      "tags": [
        "Exploit",
        "Vendor Advisory"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-195"
        }
      ]
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  ],
  "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. In versions 3.3.0 through 3.3.6 and 3.4.0 through 3.4.4, a heap-buffer-overflow (OOB read) occurs in the `istream_nonparallel_read` function in `ImfContextInit.cpp` when parsing a malformed EXR file through a memory-mapped `IStream`. A signed integer subtraction produces a negative value that is implicitly converted to `size_t`, resulting in a massive length being passed to `memcpy`. Versions 3.3.7 and 3.4.5 contain a patch."
    },
    {
      "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. En las versiones 3.3.0 a 3.3.6 y 3.4.0 a 3.4.4, ocurre un desbordamiento de búfer de pila (lectura fuera de límites) en la función `istream_nonparallel_read` en `ImfContextInit.cpp` al analizar un archivo EXR malformado a través de un `IStream` mapeado en memoria. Una resta de enteros con signo produce un valor negativo que se convierte implícitamente a `size_t`, lo que resulta en una longitud masiva que se pasa a `memcpy`. Las versiones 3.3.7 y 3.4.5 contienen un parche."
    }
  ],
  "lastModified": "2026-06-17T10:26:28.887",
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